Welcome to the future

[Bad Max]

I see your dilemma, there is no specific forum for brakes, Mods fix it!!!!!

So perhaps General V-Max (1st Gen) Discussions or Wheels, tyres and suspension would be more suitable.

You mention double banjo at the master, which implies you have after market brake lines, one line running to each calliper (OEM has one line from master to a splitter, then one line from splitter to each calliper).

The 3 line vs 2 line advantage/disadvantage has been discussed with the conclusion being there is no difference in performance but it appears that there may be difficulty in bleeding.

You found the problem but can you share how you resolved it?

Sure,I noticed very small bubbles in the master res could not see them coming from either caliper so I just slightly released the banjo's and a spert of fluid was released along with a very slight hiss .Serindipitice at best basically I kept going around all of the possible outlets releasing each one until there was only one left and bingo bobs your uncle.