I almost forgot: the other reason to get the Black Widow running is that simply they are dm fine little engines and deserve to be running at about 18 grand or better on a nice sunny day with a grinning pilot standing somewhere below.
The Cubs were OK
in their day but not in the same league. Good fun if you lighten the wagon a bit and give them a fighting chance. 36"-44" old-time FF designs and that sort of thing are a nice match. How coincidental, those are the wingspans of the two Tomboy versions. Lots of nice choices out there. I might also suggest if you plan to order a SOYY kit you do it earlier than later.
MJD