I selected the P500 last year to replace my lifted EZGO, which replaced a kawa teryx. This before I heard anything about the P520. I had been traveling approx 11,000 miles year (pre-wuflu) to tournaments towing my Toy Hauler with cart on board. The Teryx weighed in about 1600 lbs as did my Polaris. The EZGO was 900. Through this process of different vehicles I got a bigger TH and eventually a bigger truck. The major tournaments were beating that EZGO to pieces. The out of the box P500 weighed in at 1025 lbs and is 50" wide and I think 9' long. Anyhow it takes up less space than the EZGO.
I find that the P500 and for sure the P520 are near perfect. With a few additions they are perfect for 1 or 2 shooters. I find the "tray" for the P500 ideal and have little use for a dump bed in any of the previous rigs or with my new 2021 P1000-3. The other changes in the P500 to P520 I can't comment on.
I am under the impression the tires on the P520 are not like the OEM on the P500. One course I shot at in Utah had me driving about 3 miles each way on pavement at 35mph. that seriously scrubbed some tread.
I put a basket on the front, flip-up windshield, Honda roof, seat covers, fabric upper doors and back cover. I also modified a Great Days gun rack to meet the NSCA requirements for vertical mounting. Also 8 ply tires on 27" alloy wheels. See attache photo.
Let me know if I can help. I might add that 2 of my shooting buddies are awaiting either machine. Whatever the dealer gets in first.
s/f Steve