Re: what tricks other then xy

The Deus loves junk , especially alluminum , so you best get used to it in a modern setting.
I find the XY screen problematic as a detecting mode as it only really differentiates the "bad" junk. Learn to ID the "round" sound.
The best method for eliminating bottle caps is the frequency change. I think there are referrences to it in both the manual and Sabisch's book as well as numerous write ups about it here on the forum.
Hopefully the XP guys have addressed the issue a bit with their update.