Hi guys; it's been a lot of years since I've built any balsa models, and those were airplanes. Does anyone have an opinion on which boat I should build first the Hot Shot IV or the Hot shot Sprint? I'm sure which ever one I do, I'll be back often to elicit more help along the way. For those that have built either of these, did you upgrade them in any way? Not that they would need them, right, Jerry Dunlap?