Hey brother I hope all is good. Is that inch and a half? You need a 64 mm hole saw for inch and a half
Uniseals can be a problem if the hole is not uniform and smooth.
Try to use a real fine sand paper as well and all should be good.
Glad to hear you bailed on that bucket because if not today it may have given you some problems or even costing you your plant. You probably dodged a bullet for a few bucks.
Sounds to me like a real wise choice
When you get around to it don’t forget to lube your pipe lol with some dish soap before pushing through the uniseal
Play safe and enjoy