[Leica] Lens coding

[Peter Klein]

To fellow digital M users:  What do you folks do about lens coding?

Some of my lenses are coded, some aren't.  My general sense is that 35mm 
and shorter lenses need to be coded to avoid cyan drift in the outer 
regions. But for 50mm and longer, it doesn't matter much unless one 
cares that the EXIF data contains the correct focal length. I've found 
that when I'm changing lenses in fast situations, I can't count on 
always changing the manual lens ID in the menu.

I'm planning to get a couple of Fotodiox PRO adapters for my 50 and 90mm 
LTM lenses.  Their reviews on the B&H site seem to be mostly positive, 
unlike some other brands. Can anyone here verify this or suggest a 
better alternative?

As for my still uncoded M-mount lenses, I'm torn between coding them 
myself, leaving them alone, or getting them coded professionally. 
Choices include:

- Have Leica do it, at I believe, $300 dollars a pop.
- An independent repair person like DAG, or, who else?
- Buy lens flanges with coding pits from eBay and install and paint them 
myself. (beware Chinese quality control?)
- Using my M coder template and an oil-based industrial marker to code 
the lenses myself. I've done this before, but it is painstaking, 
requires some trial and error, and has to be redone periodically.

Advice based on personal experience would be appreciated.  Thanks!

--Peter