i never used a reducer tube - i just used thicker, higher VG juice and it's what i use all the time now. i'd not go mad with the magnets either because you can always bend the door to work without them.All my grandiose plans about stocking up!
I am, at least, nibbling away at that big bite. I bought 5 springs this week!
Are you talking about the '510 adjustable grub screw'? Or, are you talking about 'stainless center post'?
Extra grubscrews might be a good idea depending on how often you actually adjust an atty and lose one in the carpet (you'll find it with the sole of your foot in a day or two for sure) and 5 springs will last you forever unless you are unlucky or careless!
i quite like the old Reo bottles; i've replaced one in 5 years.
T