First off, I really hope you ain't the same guys flying with the DHC tag from back in .84, that is, the ones that would chase an unarmed, trader IDed Preagle with a class 8 shield to Vogtland just because it was prefixed "LWB|" (was actually setting up...), or the ones that told Dragons defending their home to "chill". I'll give you the benefit of the doubt, tho, even if the tags are remarkably similar.
With that out of the way, my major concerns are relations with IMG and use of Bounty Hunter weapons.
IMG recruit from those who are dissatisfied with corporate mining, but do not want to be as extreme as Mollys/Hessians about it. As such, there tends to be tension between IMG and mining corporations (re: BMM) and I think hauling raw materials from IMG bases is unlikely to happen at best (especially from the supposedly secret Falkland base in Tau-37...which features on one of your trade runs-you may want to fix that...).
As for using Bounty Hunter weapons, whilst they may well be "better" statwise, that should not be a primary consideration when selecting loadouts...if you want variation, you have laser (8.33), Tachyon (4.00), and Plasma (2.00) weapons already to chose from, but the majority of any corporation's guns should probably be civilian made anyways (yes, an issue, due to civilian made stuff being kinda Agiera-made...although, if I recall, one of the Rheinland corps was making handguns in vanilla...not a great jump to start producing spaceship guns...which can be represented by Flashpoints...), especially as Rheinland is at war (again), having already squandered their entire industrial base 17 years ago in a war which saw the destruction of their entire military force...perhaps Hornvipres and Firekisses should show up even more rarely?
As for "forced" donations...well, they always put me off joining corporations...maybe a better method is to institute a system of voluntary donations (after all, no matter how much someone claims it's for RP, one of the main reasons to make a corporate character is to make cash to fund other projects...)