Thanks to all who provided info here or by PM about diameters of the LT4, CP3 and Fizan Compact poles. The responses were all different, but all over 5/8" (.625") (15.875mm), so all should work, because the foam extension sleeve can expand a bit with lubrication over the pole. Actually, with a tighter fit, no adhesive is needed, as I learned from the golf pro.
Since I palm my pole much of the time, the CP3s are a problem, and don't want the hassle of replacing the grips, so the Fizans of the same weight, 5.6-5.7oz, would be better for that reason, in addition to the other reasons stated in my earlier post.
Would like to save another ounce per pole with the LT4s, but a 2 section pole won't telescope short enough to secure the awning on the tent to be used, and would need to know a lot more about the composition and durability of the carbon tubes before spending that kind of money. Had over a decade of disappointments (and wasted time and money) with carbon tube tent poles before finally finding reliable ones, so am a little sensitive on that subject.
William, Thank you for the 17mm spec on the Fizan. Tried, but could not get through to ULOG - they would not accept numerous attempts to replicate their security codes on their contact page. Hate it when merchants do that, and furnish no email address.
So will probably order the Fizans from ODGB which has been very reliable and responsive in the past.
First, though, must see if the extension sleeves on my cheapo poles can be removed intact. Yet another work in progress.