Aaron- That's the same kit (box art too!) which I built as Yellow 5 a couple of months ago. I'd be happy to help you any way I can, although Stan is the real expert on 109's.
Couple of things about it... (pardon me if this has already been covered)
An extra panel line is present on the upper surface of the wing, between the most outboard line and the one near the inboard end of the aileron:
Also, part number D29 is the K-4 IP, be sure to use part number F19.
As far as the tires/wing bulges, the small bulges Stan mentions (L1 and L2) correspond with the smaller 660 X 160mm tires (L3) and the larger bulges K1 and K2) correspond with the larger 660 X 190mm tires (K3).
There are four variations that I am aware of for the tail configuration, but only two can be built OOB with this kit. The rudder depicted in the kit is the metal type, and it comes OOB with the trim tabs intact. Some aircraft did not have these. If yours didn't, simply sand them off. I saw somewhere a drawing showing all of the tail types, but cannot remember where I saw it.
There is a fairly prominant step when you put part A3 (cowl top) onto the fuselage. This should be faired in. The real cowl had a small panel line here, but nowhere near as large as the kit.
Carburetor intake should have a weld seam around it, if you want to add it.
The cockpit OOB is missing the large, yellow fuel line.
The inner flap portions do not have a very large maing surface, I added wire to aid there placement. Otherwise, they fall off regularly!
I hope that helps, there's probably more but that's all I can remember. If I can be of more help, please ask!
Stan- Thanks for the photo of the UV lights. Did you happen to find a photo of the gunsight cord mounting?
Guy- Excllent work on that IP! I may have to bite the bullet one of these days and try some PE enhancements.