That "Knight-Mfg" link might be cool if their LIA-77 and LIA-100 "launch pad kits" were ACTUAL kits for launch pads, but they are NOT...they are just metal hardware packages that are OUTRAGEOUSLY priced with one still having to source/cut/finish wood from templates.
Onc could piece together those metal components from a good hardware store or industrial supply for 25% of what they are charging.
What they call "kits" are a BAD JOKE.
They also list a 5-station sawhorse-style pad for an idiotic $339.00 when it has about $50 worth of materials.
PULLLLLLEEEEEEEZZZZE.

I'm all for a REASONABLE profit by purveyors of goods, but refuse to be ripped off.

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When in doubt, WHACK the GAS and NEVER touch the brake !!!
No Harm=NO Foul advocate

Pump UP the MAYHEM !

Yes, there is such a thing as NORMAL, if you have to ask, you probably aren't !