let thebpm syncronised loops be your sequencer .. i know most sp 404 nd 303 heads use loops to make compositions < so much more effective than layer by layer method .. probs best to work in mono though cos of polyphony issues .. then add extra snares n `fly` layers over in resample

I have really hard time syncing loops without resampling, even BPM sync'd loops. Got any tips to get perfectly sync'd loops?

not perfect looped .. get drums as tight loop .. 1 bar ..up that tempo to nearest 0 or 5 (example 95 or 100) then get other loops as tight as nd set them to the same tempo .. resample as 1 sequence for its whole duration then add extras over top

i just chop everything.

i chop too .. drop the chop sequence nd use as a loop with own made drum pattern loop