Took test today and busted for root suck back on bottom part .. but test is 2" heavy wall. 5/8 wall thickness UA63 Tig root and one hot pass fit gap is up to you .. but they gI've you 5 hrs from start time .. you fit it tack it tacks can't be no larger than 1/2 in no more than 4 tacks I use 3 t...