I have an old DTA Covert Gen II that has the full picatinny rail. I still can't seem to find the A1 handguard conversion that would allow me to run a full length arca plate. Failing that, what would be the best way to mount a full ARCA plate ? I haven't seen any full length 6" long picatinny arca rail (only the smaller one). Beside getting a universal Area419 Arcalok rail and have a machinist drill and tap a bunch of holes, would there be a more elegant solution ?