I have a miller syncrowavr 300,I weld my own cranks,stock cranks are easy because the center web/pin are one,Im no certified proffesional on cranks but i have a true stan or v-blocks a brass hammer and a dream,I beleive in checking the crank after its welded,but the heat if done rite should not rack it at all,Wisecp cranks have been plagued from discussions i have had with people,get it lookes at by someone who deals with banshee cranks