from what i have read all that has happened to your mtb v brakes is that where the cable noodle slots into place on the calliper, the gap has opened meaning it wont hold it in place? if so a pair of pliers and very gently squeeze the metal together, will never be as strong as it was but will be fine as a short term fix mate.
As for the brakes on the rip, as long as they are set up well they will be good, alot to be said for simplicity!
are the punctures pinch flats, or items penetrating the tyre? if pinch flates, as already said, stick a tad more pressure in, or consider replacing the tyre, if its thorns etc, try the panaracer kevlar strips, work well at reinforcing the rubber!
hello, returning to trials after a few years out, been riding mototrials since 3 and still compete, started cyclo trials about 5 years back and it lasted for two years but i snapped both my onza frames and it was costing to much, couldnt do everything! cheers