Thanks for the great comments everyone!
The barrels are from RB Model, from Poland.
http://www.rbmodel.com/index.php?action=products&cat=c_bm
I ordered a few barrels from a seller on E-Bay a few years back, and he was nice enough to include 2 MG34 barrels as bonus.
They are well detailled, and more important, not too expensive. The 2cm KwK 30 L55 was close to $5 USD if I recall.
SnakeEyes - I wil probably end up painting it German Grey, as I am depicting an early war vehicle. The exhaust cover was included in the kit, the chains are from an Aber set, the workable tool clamp (more to be added) is from Lion Roar. The rest of the metal tidbits for the tools will be scratched. They fell off while I had this one in limbo...
Jord - That gap really bothered me. I could not get a clearer picture of it, but I think it would have been too visible once painted. From what I could find in my reference and looking at pics from the Ausf. C in the War Museum in Ottawa, the front nose panel is sometimes flush with, or higher than the hull's.
Rob - The Panther is on the shelf for now. I'm waiting for better weather to clear up the basement before I paint anything. I have a few other kits to paint before, which should get me back in the game before I finish her I have been around for a little while, but took a little break from the forums during the last couple of years. As for the sleeve, I seem to remember that the fit of the barrel was terrible without it, due to the kit's engineering. Someone on another forum solved the issue, which I also did for mine. However, I don't remember his name to give him proper credit for his idea... There was moulded on bolts on the suspension, but it was easier for me to replace them instead of trimming around.
Johan - The redish stuff is Bondo's Glazing and Spot Putty, just to fill in the seams. Works great and inexpensive.