Oh Good Point, Did I mention the 20 hours it took me to cut and fit the cowl on a GP Chipmunk for Zenoah G-26 ( those things should be in Weed Whackers cause they are not shaped to be in Model Aircraft!) and don't get me started about hardware!!! missing or does'nt match or to lame to risk your plane with. Yeah I can see 16 to 20 hours IF I HAD A FULLY STOCKED HOBBY STORE in my garage!. I GOT IT!! ...It takes 16 to 20 hours of actually affixing things to the plane, and another 100 hours finding the right things to affix ! THat's what they should say