Haven't quite figured out how the steering post will attach to the adaptor. It appears that the tube is flared on one end but there is no clamp in the kit and none called for in the parts list. Maybe it will come clear when I get the adaptor. I’ve never had a threadless headset.
I’ll loose a little height when I switch from knobbies to a road tire. Not too worried at this point. I want to spend as little money on this experiment as possible so the adaptor and some cables are it. Once I’m sure I like it I’ll find a better donor.
When I got married the first time, in the late 1970’s, I had a pair of 3” platform shoes. My ex-wife is 6’1” and I’m 5’10” I had to do something. Wish I still had those shoes, they’d come in handy when I start to ride this thing.

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Pete
Infinity LWB (Godiva)
TerraTrike Zoomer (Yellow Peril)
Sun EZ-Rider (Wife's bike)
"Blind respect for authority is the greatest enemy of truth."
A. Einstein