For those having problems with the 'fat grip' Paras, you might consider replacing the standard Para trigger with a shorter unit.
I found much concentration was needed on proper placement of my trigger finger with the standard trigger to consistently shoot the Para accurately. After installing the short trigger, I find it much easier to switch between the Para and single-stack guns and shoot both gunns well.
I installed the Gun Craft short trigger, Brownell's part number 376-100-010, page 103 of catalog 53.
Highly recommended for short fingers (like mine)and the fat grips of double-stack Paras.