Nice stuff, Erich- good info on the guns (and far less off-topic than some of the stuff I've seen!). For some reason I was under the impression that the guns were referred to as "RFK##". Not sure where I got that though...
Keeping on the general topic of these recoilless weapons, I wonder why they would still be in regular service by 1943- I'd assume the Panzerfaust and Panzerschrek were far more effective...
And this gets us back to their use at Kursk... why, who, and in what manner... I would tend to guess that at Kursk, considering the more effective anti-tank methods available, that the LG weapons were used more as portable light artillery. Maybe this would explain their deployment with regular army units...

Back to the Tigers... Although Fey's numbers do seem higher than some more recent sources, I would actually tend to believe the actual figures are in fact closer to Fey's numbers. Tigers were great tanks, but at Kursk they could not generally be used effectively. Tigers were intended for long-range combat against other tanks; at kursk, the Tigers fought often at close range under very heavy fire. I would tend to think that many were lost...

I think one thing about the "numbers game" is becoming clearer to me... divisional returns and other pre or post battle reports provide most of the numbers we use. And these numbers often do not note, or at least do not specify, vehicles that are truly knocked out versus vehicles that are down but can be repaired. Many of the hits taken by a tank that would disable it would not actually destroy any aspect of the tank. Tracks being the perfect example- a tank that has its tracks knocked out is disabled as far as combat is concerned, and would probably be abandoned. BUT, depending on battle conditions, this tank could relatively easily be recovered and repaired. Mechanical difficulties would aslo fall under this category- things which could be repaired within a few days, and more importantly, things that could be repaired IN THE FIELD. I think this would explain many of the discrepancies we see in the numbers from Kursk (and many other battles as well).
The 200 Panthers deployed at Kursk provide another good example- we can pretty safely guess that 200 were initially deployed. And we can clearly figure out that many were lost on the first day, with as few as 40 Panthers remaining OPERATIONAL at the end of 5 July. But then info gets spotty- how many Panthers were the germans able to repair? And what was the timeframe- were most of these Panthers repaired July 6 or 7, or did some of them take longer? So we do not have a clear picture of what happened after initial deployment.

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