This is more of a general wheel & lug question but it is for my Raider. I got some nice used alloy wheels but I'm not sure if the lug nuts I got are the best fit. The wheels are thick. I got extra long "ET" lug nuts with a 60 degree conical seat. They basically work. But I feel like they are not staying tight and they seem to budge loose too easily. So I have 2 questions (any other info is appreciated, I never looked into lug nuts before):

1. The shank(? the tubular part that extends deep into the hole on the rim) on the lug nuts reaches almost to the back of the wheel, there's about 1.5mm before they would bottom out. Is that enough room for the lugs to correctly clamp the wheels down? Should I remove some of that shank length?

2. The conical seat on the rims has some burr on it and some oxidation from sitting. What's the best way to de-burr and clean the seats? (I'm planning on getting an open-ended lug, putting it on the end of a threaded rod, cutting a groove into it's seat and carefully spinning it against the wheel's seats.)

I guess I need to clean up the wheel's seats before I can definitely say how far the shanks reach, but any info would be helpful. I did not anticipate all the shenanigans with lug nuts when I went with these wheels.