My Jamar line lock only lasted a month before it didn't hold anymore. It was a little disappointing, but rebuilding it was easy.

As far as my installation went, had 2 lines leading to the rear which I merged to a single under the cab. Then ran the single up through the cab, through an adjustable proportioning valve, the hydraulic BMC, the line lock, then out to the rear. I did have a Ford rear which only uses a single, so if you have the load valve on the back before the axle, you'll need to bypass or plug one inlet so you can run a single line.

Just to clear up a couple things (probably just a difference in terms) - The only systems that use a reservoir are the ones that utilize the hydraulic hand brake as a stand alone system. You cant tap into your existing brake system if your hand brake has a reservoir. This post has a few pics of the install and brake I used. The inlet was at the proportioning valve which went to the rearmost port of the hydrailic master cylinder (which would technically be a reservoir/inlet port) http://www.mightyram50.net/vbulletin...ll=1#post30098

I only bring this up for clarification because I have see a few people purchase the wrong hydraulic brake (one with a reservoir) and try to tap it into the system in series.