Shiny!!

Already made sure I have a .345" bit avail for when my iSeason shows up unless you find another way to do it. (still waiting for the thing to ship!) Kluged the IGO-L onto my Reo Grand last night so I could test it and DANG!! Really need a tube mod ASAP so I can use the IGO-L on a regular basis!
Sure is purty.
Okay, I did a bunch of mucking about with the spring -- it's not going to go into the sleeve, even with heavy modification. It's just too big, and it's actually wrapped the wrong way, if that makes sense. Looking from the top of the spring, the stock spring is wrapped clockwise; the Datalux spring is wrapped counter-clockwise. It could possibly be wrapped tighter and made to work, but its wire gauge is *strong*.
Man, I hate being the bearer of bad news on this one, but your 0.345" bit isn't going to work in the brass sleeve. The spring you sent measures a true 0.344", but the brass sleeve is only 0.389" OD. That would leave only 0.0225" of wall remaining on the brass sleeve.
The stock spring is 0.300".
Sorry Datalux! I had high hopes. Maybe you'll get it to work another way, but a smaller spring of smaller gauge would potentially work without modifying the brass sleeve. Since I've modded the iseason to use the sleeve for direct-battery contact, I'm hesitant to modify it by drilling, and there isn't enough room for this spring.