I get 6200 with 2 people onboard. This prop makes the boat jump/plain out faster and better control at slower speeds. Top speed is around 32. I typically cruise around at 4200 rpm's at ~20mph.. Here is another members post about them:
I have the same boat but 2017 and the majority of us are running this prop and hub:
https://www.amazon.com/dp/B00EVINAX6?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2
https://www.amazon.com/dp/B0013O0J5S?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1
Bearcat made my ladder for my Bennington (2017). I contacted them and they asked me to send a picture of my ladder. They had one in stock for a few hundred dollars.
https://bearcatcorp.com/product-category/marine-ladders/
That boat has a transom, not a full third/center toon. That is the gas tank for a boat with a transom. Should only have that on two toons or express package boats. SPS package would have the gas tank in the third toon, unlike the picture.
I am running the same prop on my Yamaha VF115 on SLX21 w/express toon package. I get ~32mph with two of us. Just ordered another prop (third) from Amazon. Thank god they are cheap..lol
I would go with something like this, where the guide is long to guide you instead of poles sticking up
https://www.boatliftanddock.com/product/4612/craftlander-15-pontoon-tritoon-vinyl-guides
ShoreStation makes a Toonrail that works very well. Maybe you can find something similar. It picks the pontoon up from under the deck and has a "motor stop" so you do not pull in to far. Hit the center toon in between the two rails and can't miss after that.
Many of us are running the Turning Point 13.5X15 4 blade prop on the VF115. I tried the 17" 4 blade and it was to much prop for the VF115. Thinking about going to the stainless version of it. I been burning through a aluminum prop every season...