I was asked to re-post my builds in similar, already made threads, so here are my variants. This is an XL engine version. The December quirk pass modified this mech and this crab variant now only gets a +10% Energy Range (No more AMS bonuses). Great heat management and good range, though slightly lacking in damage. The top engine gives 113.2 kph with speed tweak and honestly is a must for this chassis if you like being mobile. I originally had this with Endo Structure for extra AMS ammo back when this had AMS quirks. You're better off sticking with the Ferro-Fibrous that the mech comes with instead.
EXCUSE ME? The mech comes with FF, if you are saving cash you can stay in FF, with DHS upgrade, there is no point in taking out FF if you don't want to upgrade to ENDO. I n some of your cases you have some tonnage left, so the difference in FF/ENDO is around 1.5 tons being my guess, so basically just either BAP or 1 DHS.
I had already tweaked the chassis when I first posted this back in October, this was mostly a copy/paste of my original build thread. I had forgotten what the original chassis came with at the time. I've updated the build. Apologies.
Doesn't need a 300. A smaller engine allows you to keep the large lasers which is a big asset. Dual AMS can be done with similar firepower on a lighter chassis.