All, I'd like to improve my coverage accuracy with my backpack sprayer for broadcast operations. I think I do a pretty good job maintaining a relatively constant pressure by "feel", but I'd like to be able to monitor pressure while walking and pumping. Pressure regulation not absolutely required. Anyone have a creative "how to" on adding a gauge to a backpack sprayer? Model is a Solo 475 - I'm assuming somewhere on the handle would be ideal (tank won't work because it's not pressurized). I'm sure I can figure it out by adapting some pieces together, but figured I'd try to tap the collective knowledge of this forum first. Alternatively, can the pressure gauge/regulator from Solo's "deluxe" series be retrofitted to the standard units? Thanks!