AC, nowadays even Pask isn't 450 points. Also, since Ranged Volley is a half action for a comrade, that leaves another Half action for them, right? I know my Lasgun Expertise talent reduces their Dodge by 5 for every DoS past the first but I'd like to add my Lasgun Volley on top to force a pinning check to what I hit

The Twins don't really move in battle, so really each of my hits should have a pinning effect on them

If I want to engage in Point Blank or Melee combat with the Genestealer, do I have to go through the Horms first? Also, does Jansen have anywhere to back off too, if I suggest he pull back to give me a clear shot to the Genestealer?

if you are moving to PB then you will be considered engaged the moment after you pull the trigger.

From the original post:

So, here are the conditions of the gear distribution:

 There are 8 'units' of equipment.

 Each person can carry one unit; a person with muscle implants/enhancements can carry 2 units (it's not just weight, it's bulk) and have the same effect upon them as if it were just one unit.

 Carrying a unit cuts your Move characteristic in half.
 Carrying a unit gives a -20 WS.
 Carrying a unit precludes the use of a heavy weapon.

 If a comrade is assigned to carry a unit of gear, they cannot assist in melee, and must check to maintain cohesion whenever their primary moves more than a normal distance.

 It is a free action to drop the gear - which may damage it. It is a half action to set it down safely. It is a full action to pick it up and balance it for transport again.

Yup.

And the reason Zilch and Everest were hauling the load was tied into additional notes...

It's a bit of hand-waving and some liberal interpretation that has gotten them to this point with all the crates...Zilch hauling 2 and Everest 'carrying' together the other 6 by using his autocannon as the skeleton to lash them around and then carry as one (why you haven't seen him use any weapon but his shotgun and fist lately in the backing up description parts).  You can carry a second unit but then you can't engage in any combat and Everest can carry more because he has both Muscle Enhancements to make it 2 for 1 and the Brute of Burden talent to vaguely up it to 3 to 1.

Everest.  He's got Best Synthmuscle.  So that's easy 2 units instead of one.

 The kicker question?

 He has the Talent Brute of Burden.  It adds Size Trait (4) to SB+TB for lifting, carrying, or pushing heavy loads. In addition, he gains a +20 bonus on Toughness Tests to avoid gaining Fatigue from a forced march.

 Can he get 3? 4?  Lashing them together and being a man-grox?  This is why I mentioned that Everest is so big ala almost Space Marine big.  Well that and his Strength is a 47 and Toughness is a 52 so if you don't consider bulk issues he can easily carry 900 kilos, lift 1,800 kilos or push 3,600 kilos.

Bulging Biceps and Synthmuscle do not stack; they are concurrent benefits, in my eyes.

Everest is a special case, and I can give him credit for three units instead of two, with the same penalties/drawbacks.

The struggle to get out of the vehicle and over the gap between the hatch and solid ground was less of a hurdle for the living members of the squad, and more of one for the crates and boxes of gear they'd been forced to drag out into the field with them.

Then there were the injuries. One of the soldiers discovered a vomit-inducing level of vertigo, heretofore unrecorded in his personnel file. Another had been knocked unconscious in the lurching ride when his safety strap came undone, tossing him around like dice in a cup. Another hurt an arm and broke an ankle when the same malfunction plagued his own buckling assembly.

Perhaps the machine spirit was simply getting even for not having its usual crew, or for the proper oils and prayers not being said before being thrown into the bowels of the earth. Whatever the cause, there were now three men not fit to continue, and Jansen had to agree that it would be best to send them back on a reverse trajectory, to collapse the tunnel they'd dug behind themselves and let command know that there would be some slight alterations to their plans.

But...that the mission would continue without interruption.

The streamlined group - a "Lucky Seven", as it were - continues along the underground ridgeline, finding that their footing becomes easier, and the air a little bit colder, the further their chosen trail winds upwards through the darkness. Weapon lamps and chem-light sticks light the way, stabbing beams of white light forward while engulfing the group in a soft yellow glow, respectively.