Hoping this helps those that experience problems like I did...
purchased the pair, remote and base unit for CT26
Although many show its a 15 second process, for me, 1.5 hour pairing process...
I have paired thousands of BT devices in my life, I am no rookie...
It's always a decision, call tech support and stay on hold, or just keep plowing through....
but this time, it was Friday night, and they were not avail till Monday, so I pushed through
hopefully this will help others who have problems...
1) First if you bought the pair, they are supposed to be pre paired, not the case with mine. I watched Peter Parfit video, he claimed he had one that was not pre paired, seems to be hit or miss? But assume the two are pre paired first. See 3 below, basic pairing. QC should confirm this when u buy a pair, this is why we spend so much for Festool tools..
2) Read manual, very poorly written for pairing to Vac vs. Batteries...
3) Press Vac BT button long enough for FAST circular pattern, then press MAN button on remote, and whamo, it pairs, just like the videos... not for me. tried it 5x, it looked so easy in the video. All the lights seem to be lighting up on remote as they should be.
4) Unpair, then pair, no go.
5) Remove battery in remote, no go.
6) reinstall base unit, no go (some in videos show this as the fix)
7) Checked battery voltage, almost 3.2V, FULLY charged, no go there... if it reads below 3.05, replace it to be safe, electronics are finicky regarding coin cell batteries. Some electronics I have fail at a bit under 3.1V
8) Put closer to base unit, like a few inches, no go...
9) After all I exhausted all the videos, websites, manuals....
I took battery out, and pulled up the bottom contact pins just a tad to put additional pressure on the battery.... it worked just like it should as explained in 3 above.
How does it work? Not as good as I had hoped... the location of the BT switch matters. BT is not a super strong signal in my experience. In the past, I used to use remote control systems that you plug into, small remote on vac hose, 15 yrs, several in use, never a single failure and about $30 each. This is $88 and very finicky, but if you want to pair to batteries, well, its quite convenient. I wont be doing that for my work flow. I realize I can return it, but I have so much labor committed to it, I feel compelled to keep it now

Will see how it does in the next 30 days...
This forum has provided me a lot of help with gracious contributors, so this is one of my small contributions. Don't mean to offend the Green KoolAid drinkers, but I buy a lot of their tools, I have the right to share my experience, which hopefully will help others.
Like all electronics, they can be quirky at times. Which is why I rarely mix electronics with my tools, unless hard wired, like blast gates.