last b-17 arf I saw was the cedar hobbies (now defunct) 78 inch b-17. Never lookked to good, lacked retracts and flaps and the canopy stuck out like a sore thumb.
I'm not currently sure how true to scale this b-17 will even be, I know that when Royal was in business all their models were true to the full size aircraft in terms of size it just depended if the builder wanted to add scale details.