FYI, The Sig ARF product line is made by the same manufacture as World Models. Don't believe me just buy a Sig and WM ARF open them up side by side, same hardware, fuel tank, covering, and yes poor quality glue joints.

Originally Sig went with Ultracote, (to save money no doubt) they then changed to Areo Kote, which is the same as World Models Toughlon covering.

I have had 3 WM airplanes, the covering is okay at best, but once it starts to come up around the seams it will not iron back down. On my WM 60 size P-51 the covering out the box was comming loose around the seams, it never would iron down. Also had to go over all the glue joints I could get to with CA and epoxy, many were dry joints no glue.

Called Airborne Models (distributor for WM) the guy told me what do expect I am only the distributor it's not like I build them!

Also Tower Hobbies is dropping the Sig line, I wonder if Sig will be around much longer, very sad, but times are changing????