Hidden Power kits for Strida - any recent users?

Been sifting through the hidden power info presented earlier here but very interested in discovering if anyone;

“has had any success recently”

with the company as I wish to add a motor to a EVO I purchased or alternatively, any other options out there?

Thank you in advance!

I say recently because many of these earlier entries contain descriptions of a frustrating experience, most certainly in the beginning 2012/13, etc.