Has anyone bought these SFCs? They look like a knock-off of the SLPs but a little bit cheaper. ebay link Wondering if these are worth the money. Do they fit fine. Or should I be better off with buying some SLPs or something else for a little bit more money to save myself some trouble?

 

They look exactly like the SLP weld ins to me.

could be worth it, depends if 30 bucks is worth the chance to you or not.
I have the SLP ones and am VERY happy with them.