What you do is is your business... However, I do find it strange you have two of these units, one for you, one from another shipment for a "friend" in the UK. the one you open up the enclosure on is your friend's... I assume this because you had alluded that you had already been playing through your SL900 head when you got the first one.
TB Police, of course not! However, many folks are waiting for a phone call for #1 from YOMS, you in fact now have two from two different shipments. I call it like I see it.
If I were the friend in the UK, I'd be a bit surprised that you decided to open his unit, not just the package. That strikes me as very odd in deed.
I was in there today - he has a pile of 17 units he is shipping out. Yours should be with you in a couple of days. Sorry for your wait, but please don't take it out on me.