Welcome to the forum..

I'll give this my best shot. Here goes.

To date: The co-dom and dom Spider looks like a spider (both the het and homo form). Unlike the pastel's homo form (Super Pastel) the spider is still a spider. As far as the BumbleBee's gene (a triple threat breeder) goes. This BP has both Spider and Pastel genes visible, hence the result. Now when this guy is bred to a normal you have the possibility to produce nothing but morphs (triple threat).

When it come to co-doms, doms and recesive genes, the term Het really applies to the recesive type. I know this is confusing but hang in there. You see, with co-doms and doms the results are either there or not. You can either see its a pastel or a normal in a clutch. The term Het for (co-dom / dom) does not apply with this type of genetic trait. With recesive type hets you see all normals in a clutch (albino x normal). At this point all of the scale kids in this clutch are het for albino. The term Het for (resecive) does apply with this type of genetic trait.

A bit confusing but with time and some reading you'll get it eventually. You can do some searches in this forum for some really good reading. Hope this is clear as mud.. Welcome