What boat is the 4-way system on? It not often used on spinnaker boats.

I have a couple of comments on your system.

1) From the picture, it does not allow fore and aft adjustment of the leads. This is important in going upwind.

2) That is a lot of load on a V jam type cleat

3) When you adjust one lead, the other seems to go in the opposite direction

A simpler system was used on the Tornado. It had 4 or 5 loops of line protruding from the tramp. The jib blocks had a quick release that allowed you to easily move them to the appropriate loop. On the Tornado there was also a barber-hauler. to adjust the jib.