Thanks for the tip, indeed I wasn't aware. I now set it up that way and it works. ^^ I'll have to think what other binds I could modify that way.
I wish there was some way to set up the FA "reverse" - so you can fly FA Off by default and momentarily engage it for as long as you hold the button, in order to stabilize your bearing. But that doesn't seem to be supported.
After some more fiddling with the settings, the last test run in a Haz went much better. Still not as easy and powerful as a Chieftain but not too bad. Biggest problem now is that the OC Beam drains the cap like crazy, so the ship needs a lot of pip-juggling. So I'm thinking about downgrading that to a pulse or burst laser after all, despite the huge hit to DPS that would bring. SRB would still draw a lot more than the PD can deliver so that wouldn't improve much. The idea switching to Burst would be that it can run with less power in WEP, allowing for stronger shields and more agility, hopefully resulting in more time on target.
Also, as with most ships that are not my Chief, enemies chaffing and popping shield cells are a real nuisance. The Chief I run with mostly fixed weapons, but on the Mamba that's not practical due to non-convergence and extreme sluggishness when you run out of boost.
That said, the Frags really cause nasty damage (also thanks to softening the target with corrosive). The endurance with one magazine is okay, when I ran out I had enough for one session anyway, and also the corrMC had almost run dry at the same time. Not sure how useful Drag Munitions really is; might swap that out for Screening Shell.
I ran this with 2 GSRPs and no banks, and most of the time my shields were between 35 and 60%. (I did use the reboot/repair exploit once or twice after all) Once I had an "incident" probably when fighting a Wing, that took out my shield and brought the hull to 70%. So, good thing I already had changed to Reactive LW hull, with the stock hull it would have been rebuy screen at this point.