Mahindra 1526 3rd Function Kits?

[Electricporkchop]

I'm looking to add a 3rd function kit on a Mahindra 1526 HST. I see there are may different kits ranging in price from $300 to $1300. What an I missing here? I understand you pay for what you get but that is a huge price difference.
Looks like the only requirements are gpm. and hose length. 1526 looks like its 13 gpm.
Any recommendations here?

 

[jwmorris]

Low buck 3rd function.

I was trying to figure out why they seem to cost so much and decided to put my own "kit" together. Looks like the tractor in question has ~8gal/min on the circuit I wanted to tie into so I ordered this solenoid I then set it up on the FEL where I wanted it (and would clear the parts welded...

www.tractorbynet.com