RS supplies a righting line for the Aero, it's about £25. I'm short 'n bulky(?) and whilst I can't reach the gunnel, the righting line works well for me.
http://www.rssailingstore.com/Catalogue/Other-Parts/R/rs-aero/RS-Aero-Righting-Line-Kit-AER-UA-105
I also find it difficult to reach the main sheet when getting in over the side, and invariably get in over the rear. BUT!! you have to get in the upwind side of the transom, AND, if your endeavors, (albeit accidentally), place your weight on the tiller, it will snap clean off! I've found that the knack, is to first push the stern down with straight arms, then, slither your way in. It's not elegant, not unlike you would imagine a seal doing it, but I'm 69, and all I care about, is getting back in the race! On second thoughts, an old Walrus is probably nearer it !!!