I did a lot of research over the last year and finally pulled the trigger. I purchased the Go Surf Assist system from Wakemakers and had my local dealer install on my 2011 Malibu VRide21 (05 - 08 VLX hull.) It was the installers first GSA install so I had Ryan from GSA guide him through my hull specific details and general installation.
Two issues arose with install of the tabs on my hull.
1. Both Tab hinges needed to be modified around swim platform bump out on hull to ensure hinge was above bottom of hull.
2. Tab had to be installed 2" in from side of hull because of swim platform and actuator clearance. 4" is the recommended measurement but GSA gives a 2" tolerance in either direction.
Ryan also suggested that the tab angle at max deployment be set at 8 to 10 degrees for malibu hulls of this era. This max angle will be the skim style setting on the controller. My install resulted in 8* max deployment (skim style)
and almost 0* (level with hull) minimum deployment for surf style wave. I thought this was backwards, but confirmed it with Ryan and he said this install should be ideal. There are also 3 angle settings on the controller between surf and skim settings for adjusting the wave. It is also important for the tabs to retract as close the the swim platform brackets as possible when stowed to avoid potential wash in the wave.
I can just fit my pinky in between platform and tab for reference.
The controller is nice and easy to use. It has some nice features. One feature is lift mode, which dramatically improved my 0-22 mph time by approx 6 seconds with full ballast for wakeboarding! I'm at 3000 ft with 350 motor and 2419 acme prop.I was really impressed and the tabs retract automatically at 15 or 16 mph once you are on plane.It also will connect to Apple devices via bluetooth and the E61 surf app to allow remote control from Apple device. The newer controller also sets the tabs by default to your last setting on the dial. So if you have the dial set to surf, when you hit surf left, the tab will deploy to the 0* angle on my setup. The older controllers always defaulted to max deployment regardless of last setting and adjustments needed to be made each time.
I have water tested the system and am really impressed with wave and system performance. I have not surfed it yet because of cold water temp so all observations are from inside the boat.
Ballast setup during testing:
Bow: 750 plumbed bow bag on seat, 200 lead (no front tank on vride)
Midship: 580 bag plumbed in place of hard tank, 370 plumbed bag under coffin seat port side, 600 lbs in peeps, 3/4 full fuel tank, 300 lead moved around as needed.
Rear: 400 hard tanks, 1500 plumbed bags, floating wedge. GSA tabs.
Update: I forgot to mention a few other details. Transfers were clocked just under 3 seconds, Tabs provided some lift and lowered the bow significantly, especially when in skim setting. Nose will rise slightly in surf setting vs skim, but both had less bow rise than same weight setup with a suckgate. My shorter drivers will really appreciate this result.