I have
DBA 4000 all round.
Bendix bads
Braided lines
Martini dot5 fluid
(Was on semi's also)
Did a day at wakie last sat and had no issues with the brakes what so ever. One thing was - I wasn't used the stopping improvement and was braking waay too early.
Pedal feel was great, no spongyness. I gave them a good work out and for a budget upgrade, Im really happy! (I do a fair bit of track work now so for my budget, I highly reccomend it)
Oh - just looked at your mods...yeah you may benefit with bigger brakes (I was only running 200rwkw or so on low boost on sat)