ARC LS15: did they ever use Mundorf MCaps on it ?

so, the answer is: no, ARC never used Mundorfs on LS15, as I thought.
I am in Europe, and as some said I'd better buy an LS25 or some Ref than send the LS15 to USA and back, paying ARC's intervention in the middle... ;)

Johnsonwu,
the key words are "as long as it's done right".
I cannot check in any way if it's done right at some thounsands km from the seller; and if the seller says he did not modifiy anything and I just 'caught' him, he may lie on many other things, maybe not so easy to see...

Moreover, I'd like to know how the original ARC design sounds; then I may even want to improve or change something in time, but firse I need to know the starting point.

Last, I don't have the chance of listening to the LS15 (neither stock nor modded) before buying, so I may not like it: I don't know how it works in USA, but in that case in Italy it would be very, very, very difficult to resell a modded object. I should almost give it away for free (well, ok, it's an hyperbole, but I guess you got it).

That's why I'm looking for an original preamp. :)

yes, but for me not before listening to the stock one (that's a personal opinion, obviously); and then again, I would neet to be sure about who and how worked on the preamp.
moreover, as I already said, if a seller lies on one self evident fact, he may lie on anything...

anyway, in the end I decided to let the LS15 go... now I saw a pair of LS16 (one mkI and one mkII); see related thread :-D

but most people tell me that neither an LS15 nor an LS16 (regardless of mk) would be a significant upgrade for me.
most people tell me to go for an LS22 or LS25 or, at least, LS17.
they may be sure right, but that takes 1000 euros more...
I think I have to think it over for a while.

No, unfortunately it was not modded by GNSC: that would have been a different matter, indeed.
I know people, even here in Italy, who are very able at modifying electronics and I would trust them; Huntley is world famous and he would sure be one of them (btw: is he out of business ? I think I've read something about it).
But that 15... no one knows who put his hands in it.
Anyway, now that's past. :-)

Thanks again to you all.

Thanks for your wishes, but meanwhile several people tell me that even the LS16 would not be that great improvement over my LS7 and suggest me to go straight for a 22 or a 25 without caring for the... numbers in between (14,15, 16, maybe even 17).
wow ! confusion !
anyway, I guess I'll take some time to think it over and make up my mind.
thank you all.