Here is what I decided to do.
I am not willing to remote downpipes every PTU change and I am planing to change every 10-15K, now
I will drill the drain hole on the bottom of PTU, drain that way and fill from the went hole tube.
I will measure my drain amount and fill same exact amount back.
Only downside of me drilling is that I will lose my 2 year warranty on my PTU that I just had replaced by the dealer, but ohh well.
I will make nice video about and do write up.