Hi Steve,

I used the 2soulcycle ones on my recent 29er. I used it because the postage works out better to the UK, than the paragon ones from the US. As far as any difference between thru axle and normal QR, I think you would be hard pushed to tell the difference; I am still in the the learning phase of being a framebuilder, so wanted to try all available options (and this frame was built for me, as a test).
As far as building, it is beautifully simple to use. Similar to using a breezer style dropout.

Only downside to the Syntace is you need a tool to remove the rear wheel.

Clockwork, I like the removal of the Chainstay Ledge, certainly makes it look neater, and stronger too.

Toad 2Souls Dropout.jpg