I wasn't fully satisfied with my answer about steeking. So I did a little search. I found that the Dictionary.com said:
"Steeking–verb (used with object) Scot.
to shut, close, fasten or lock (a window, door, or the like).

Origin:
1150–1200; Middle English (north) steken (v.), Old English stician to prick, stab" Link here

I also found that it is commonly used in knitting. See here.

I am not familiar with this term being used in kilts but it is possible but that other manufacturers may use it, but I have never heard it before. Given the definitions and unfamilarity with the term I can't answer your question on my opinion on steeking with Bilt Kilts. If you could reword it please and will do my best to answer.