Matt, do you have a link for the exact Teflon material you are using for your coupler?

I want to include the link in the "Cookbook" post so that the Teflon option is also available in a common location.

Just for the heck of it, the last couple of times I've flown I have used the electric starter for the first start of the day, without using the choke. Starts up fine after a couple of seconds, with subseqent hand starts the usual one- or two-flip affair. With the no-choke option available, it is obviously a viable option to use a simple carb stack (venturi) without having to use the choke plate, or looking for some ingenious way around it.