Hi Danny,
Have you ordered chain yet? If you haven't, snoop around on Ebay. Sooner or later someone will offer NOS Diamond brand #41 roller chain at half or third regular retail. I know, I done it. The 415 crap is just that. The 415 that came with my Bike Berry kit stretched so much the spring loaded tensioner ran out of travel. The Diamond 41 chain on my flyer may have stretched a few thousands of an inch.
I'll offer another rarely discussed except on the other forum chain treatment. Chain wax. There is a home made recipe.
I actually did start there. Paraffin, Teflon powder, and High Moly grease. Degrease chain in mineral spirits and drain till dry.
Get a $10 crock pot from Wally world. Add and melt the wax, teflon, and moly grease on low, add chain, soak for an hour, then turn it off. Next day melt the wax again and remove the chain carefully. HOT! I use a bent coat hanger to fish the chain out and mind the dripping wax. I f you want to, wipe the chain down with an old terry towel.
That works well but still draws dust which wears all mating parts. So a brief search resulted in. Speed Wax.
MSPEEDWAX | Molten Speed Wax - Hot Melt Bicycle Chain Wax Lube By MSPEEDWAX
Check out all their links.
Tom