I am getting close to adding front aux as well and debating the pros & cons of 3 systems.
1. Use the rear remote
Pro - simple to install, just adding hoses and couplers
Con - 2 lever use
current lever is low and partially tucked under the seat.
If I used this method I would extend the lever up closer to
the joystick
2. Use electric diverter valve and operate with the curl function
Pro - 1 hand, 1 lever operation
Fairly simple installation - tee into bucket lines
Con - Cost of the valve (hoses & fittings will about equal to option 1).
Manufacturer suggests removing the Regen spool for bucket dump
(accidentally going into regen with grapple would close the grapple)
3. Use WR Long system or similar with indivdual purchase parts
Pro - All functions on the joystick but not tied in with curl
Offers potential to fnction all 3 simultaneously
WR Long kit comes with nice handle, swithes already mounted
Con - Little more cost than #2
I still haven't decided but am leaning towards using the rear remote at first, see how I like. Can always add 1 of the other control options later.