Picked them up this morning. Look like they will do a good job. Tried to attach a picture. No luck. Google them and you will see what they look like. I got the 55lb version. Total outlay was just under $100.00. They have a 99lb version for a few more bucks. The dealer threw in the certification. Dealer came recommended by Joedy Gray (Parks and Wildlife.) Will have them at the White Rock event on the 15th if you want to see them.

Salter ElectroSamson Hanging Scale

The Salter ElectroSamson hanging scale is perfect for outdoor and on the go use. A rugged ABS casing and handle make it an ideal choice for fish and game weighing, and other outdoor uses. Multiple capacities are available, including 22, 55 and 99 Lbs. Easily switch modes between pounds and kilograms, and view the readings on the large angled LCD display screen. These hanging scales also feature hold and tare buttons.
22, 55 & 99 Lb Models

Accuracy: From .02 Lb
Perfect for fishing & game!

Get to using those things man!

what sort of warranty do they come with, can they be 0 out to accommodate a sling and are they serviceable?

Oddly enough, I never asked about the warranty. No info on the paperwork that came with it. Made in England. Yes it does have a zero featured that takes out the weight of the sling, or whatever you use to hold the fish in.