You drill one 2x6 and then remove the plug from the cutter and drill the next till you are thru.
A believe you can get slip couplings for ABS that don't have the rib in the middle so you can put it on the pipe and slip it up onto the join. I have not used one so not sure how you glue them. Or you could use Fernco rubber couplings.
A believe you can get slip couplings for ABS that don't have the rib in the middle so you can put it on the pipe and slip it up onto the join. I have not used one so not sure how you glue them. Or you could use Fernco rubber couplings.