I'm beyond pleaseD with the oberon performance replacement flanges with two 0-rings instead of the beveled seal.

https://www.oberon-performance.co.uk/search/finder/521/

pricey at $110.00 usd but I looked through the forums and quickly discovered that the oem style seal is not something that becomes less of a pain with time/experience on the bike. To a degree, yes but they are still too easy to mess up given the amount of work to get in there. If you have an endoscope handy and could check them before reinstall or wanted to mess with any number of extra steps then maybe...but personally I like the oberon design much better and it mostly takes the uncertainty out of the equation. Small price for the amount of time and effort it will eventually save you IMHO.