As I mentioned earlier I have the same aluminum body, and it completely transformed the stock 103R. The difference was not subtle. I've since tried it on several tonearms and it really shines on the Jelco 750D and 750L. The level of sound that can be achieved for less than $1000 with the Jelco/Denon combo is pretty impressive imo.
I've been running rebodied 103R's (Uwe wood bodies, ebony and clavellin-I much prefer the ebony) for a number of years now, the last few years on a Jelco 750D with a custom ebony headshell and, yes, the synergy and performance is pretty phenomenal particularly when price is considered.
My cartridge has also been retipped and potted (as Zu does with theirs) by Peter Ledermaan at Soundsmith with his $250 ruby cantilever and LC stylus. Peter charges $75 to pot the cartridge.
If you think the body makes a huge difference (and it does!) you should hear a 103/103R that has been rebodied and retipped. The improvements brought about by the retip are at least as impressive, if not moreso than those from the rebody.
I also have a 103R in an aluminum body, just back from Peter in the last week but have not had a chance to get it on yet.

