New cole jaws now key too short

Extend the shaft—-I would have to see it to suggest haw to do it.
The longer shaft may be a problem when using the chuck without the cole jaws so you may want two chuck keys.

-- Jim, Kingman, Az

If you get a Tail Stock Steady, you won’t have that problem…........ Jerry (in Tucson)

-- Jerry (in Tucson) www.woodturnerstools.com

You don’t say which chuck. If the SN2 you can get extended allen wenches like this 9” arm. Probably even the 6” arm would work since the chuck body is about 4”.
https://www.amazon.com/Eklind-Power-T-T-Handle-Hex-Key/dp/B007TKF8J2/ref=pd_sbs_328_6/146-5748054-0910637?_encoding=UTF8&pd_rd_i=B007TKF8J2&pd_rd_r=0e58851d-7797-11e9-919b-4f0ed8ac280f&pd_rd_w=QzquQ&pd_rd_wg=KmcOA&pf_rd_p=588939de-d3f8-42f1-a3d8-d556eae5797d&pf_rd_r=N89Z5VWZ81FQJCK5GQ0G&psc=1&refRID=N89Z5VWZ81FQJCK5GQ0G

For a G3 I can only suggest shortening the top arms so they will pass as I saw in one video. If you know a welder it would be simple to cut it in half and weld in an extension.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

The key for my nova chuck is machined about a 1/4” up so it can go in the chuck at a slight angle.

-- Bruce, Boise, ID