Hey, sorry that I didn't pay more attention to what a SlowStick was. Yeah, it ain't your average trainer.

But my advice still works except for the specific size rubber band. STAPLES or OFFICE DEPOT or any of them has fresh rubber bands in bags for cheap. Whatever you want to rubber band, whatever model plane, take it right through the front door and back to the rubber band rack. The STAPLES near the house has one bag of each open for inspection. Test 'em until you find the perfect fit. The bag will probably be $1 (that's one dollar) and some change. And the turnover in an office supply store almost guarantees you that the rubber bands you're buying are probably only days old. I once bought a box of rubber bands in a LHS that were mostly dead and looked older than me. And paid about twice what I'd have paid at an office supply.