SWEP.UseHands not drawing

Hey there,

While working on an SWEP for Garrysmod, I found a neat model for exactly what I was looking for. However, it uses the old HL2 HEV suit arms, and thus causes problems when using SWEP.UseHands. So I decompliled dat shizzaz and removed the arms mesh. It all works except for one strange occurrence, unless one vertex or face from the original mesh of the left hand is present, the left hand (SWEP.UseHands) doesn’t draw when it should be visble (reload animations. The workaround is to obviously leave one vertex or face in, which is what I have done, but I’m curious if you guys know why this happens?

Thanks in advance, friends.