Hi Vin- At 18.5 you should be golden. Mine was a non AFS and was 23# dry. I had a old RAM 750-ran like an energizer bunny but only put out 16+ pounds and was thirsty as hell. I think I figured the loading at 70 oz on that small wing once!!!!!. You should be allright without the crow if you cant get it but if you could it would help. The wing is still prone to tip stall -pretty small tips and hardly any (none I think) washout. I saw that plane, very well done and a beauty. Good luck. Scotty