Is it possible then to move said A/C 10 from current location in right arm to right torso where the ammo is stored and get rid of the ammo feed problem?
Knowing the spirit of Mech quirks from the concept guys, I would say no. Quirks are *supposed* to be hard to work around.
Also, are we starting with any CB and stock pile of equipment?
I'm doing the full unit build tomorrow. Depending on how much is left in the cash pool at the end of it, each player will get a disbursement for their warehouse to buy stuff like "spare parts" and "extra armor" with. Plus 3 months of "Wealth". Otherwise, the only equipment you get that you don't buy with that money will be from the Well-equipped Trait.
One more thing, when is campaign start official, and will there be tech time available to do any mods to mechs like heat sink modification and or moving above or replacing above mentioned A/C 10?
You have exactly the time allowed by "real campaign life". The campaign will "start" on 1 May, 3044. If it takes 3 months to get to your first job, then hey, you'll have 3 months on board a DropShip where you can make customizations. If it takes a week, then you'll have a week. Heck, if you want to wait a few months from campaign start and see if any better contracts come up, you're welcome to do that (and do customizations during that time). Of course, you'll still be expected to pay for unit maintenance and salaries during all that time (note that, especially if the unit has a DropShip, then the unit, not a PC, has to pay for it, and they are not cheap to operate), and if you go into debt then your Dragoons Rating will drop, which means whatever contracts you DO land will offer significantly less money and worse salvage terms in the first place.
While you're customizing, though, you'll be out that Mech and you'll still be assigned to Roles and expected to get the job done. Customization time is not free, nor should it be undertaken lightly. Waiting until you have salvaged a mech you can "slot in" while one of your Wingman's Mechs is under customization might be a strategy more conducive to long-term survival. Managing your own lance is, of course, your decision, as long as you're ready to fight when called upon.
Side note: Customization rolls will be made publicly via this forum's software, or in front of the GM at a game or via livestream. They will not be made privately, nor using any other dice-rolling software.