Have a great time flying flexwings, twistedenginestarter!
They're brilliant fun - such fabulous visibility, such an at-one-with-the-air feeling, and climb performance can be quite startling. I started my training on flexwings, stopped, and restarted some time later in normal SEPs to get my PPL(A).
As much fun as they are, I'm kinda frightened by the idea of keeping current on both SEP and flexwings at the same time, because of the control reversals in pitch and nosewheel steering. It took me a long time to get steering the right way round when I started taxying SEPs around - and if I went back to flexwings, I'd be terrified of accidentally pulling back on the bar to round-out on landing...