Stuff a new ring and pinion into the polished 30 for $150-180, then sell it to someone who doesn't believe the "35s will break a 30" bit yet, or is happy on 33s... add the money to the 44 budget.
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* from what I understand, you cut the welds holding the inner C in question on, hammer the inner C off the tube, measure five times, cut the inner C to the right length, bevel the outside of the end of the tube and the inner C where the tube goes into it, hammer it back on, carefully (i.e. whack it with a BFH) turn the inner C until the caster / pinion angle are set right (optionally cut the other inner C loose and do the same angle there too, if you want pinion angle perfect for your rig instead of having to compromise), then burn it on. Inner Cs are forged or cast steel, not cast iron, so you aren't going to cause any damage by welding it with a MIG welder iirc.