Board Thread:Questions and answers/@comment-27306930-20160108011757/@comment-3362895-20160108101459

According to various reputable sources, working on a RapidStrike is a whole order of complexity higher than Stryfe (and Demolisher and Rayven and many others). So if you like your challenges gradual, I could recommend Stryfe.

OTOH, you are a self-professed engineer and tinkerer, so you are probably well-equipped to handle either.