Has anyone used kits from Cronoarms?

[Apharmd]

Hi guys, got anothet stupid question.

 

I was looking at the group Cronoarms, and was thinking of buying their Northstar kit for my Hi-Capa.

 

I was looking at some of the instruction manuals, and the one for the Endshot says not to rest the gun upright as it will break the hook on the bottom.

 

I was concerned that the kits were somewhat fragile, so I looked up Youtube, but there's no review vids, most are of people using the guns.

 

Has anyone here used one of their kits, and how are they?

 

Thanks.