He could also use a Driftmaster rod holder base attached to the gunwal, a piece of 3/8" or 1.2" all thread, a wing nut to lock it to the base and a couple of nuts & washers to attach a Walmart cutting board. There are any number of ways to do a cheap baitboard.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115
Bitter Gun Owner