After about a year of using the Vanguard GH300T pistol grip on my Vanguard Abeo Pro tripod I found it to be cumbersome in that it's quite large and sometimes gets in my way when looking through the cameras viewfinder. So to day I replaced it with a more traditional ball head, a Vanguard BBH-100. I think I will find this ball head to my liking. Will see if I miss the one handed operation of the pistol grip.
Dave
The replaced pistol grip.
The new Vanguard BBH-100 ball head.