Let's say I have the opportunity to fly a PA-28-140 and I've never flown any model Cherokee before. I have roughly 215 total hours, 130 in the last year, 110 in a complex (Mooney), experience in roughly 7 different aircraft total. I tend to learn very quickly, have always gotten through any transition training I've done with limited hassle, also, I do my homework on vSpeeds and quirks of the model and such. So basically I'm looking for opinions on whether it's just foolhardy and pointless not to at least fly with someone with experience once or use this as an opportunity to stretch my wings so to speak and learn something new on my own. After all, people learn how to fly single-seaters by themselves all the time.