Okay then that's good!
Depends on how stiff you really want it? 4 bolt boogers will eliminate pretty much most flex but then the brake will feel less bitey, they can be a bit awkward to set the brake up to. I have used a tensile 4 bolt and it was exceedingly stiff! 2 bolts are alot better IMO, they stiffen the frame up but still allow bit and are less fiddly. I have used a 2 bolt trialtech and I would highly recommend it! It really did improve my brake on my tpro alot.
I would reccomend the trialtech or echo boosters