Hum confusing for sure. The gray ones i got  from amazon where correct for many of the gray dongles on my harness the black ones as noted needed to be different and the b is for thermal interlock and water rating the key is black for those differences from what I read in the industry docs... but I could be wrong.
 

the only reason I am point out the confusion is I ordered dt04-pb and got black non b keyed "" connectors... From what I can tell the style **** dictates the inener lock out groves or other mods and a b keyed item is a style of black keyed connector.... type of key can very in the style, as I said I actually bought b  that came with the wrong lock out groves location and had to re order pb with a new sub style.

This link will get you to the b "" keyed in the Same key as the one on the stereo harness you will need two 8 and two 12

https://www.customconnectorkits.com/products/dt04-12pb?variant=45536276382014

Thanks again for the clarity and help. Not sure why some b have groves in one location and others have what people call b keyed and have as noted the location needed for our black connectors. 

27 minutes ago, dshack said:

The Blackfire product looks interesting. Did you use the standard pro, or the Black Edition? Thanks!

I used the black edition

https://carzilla.ca/a/s/products/blackfire-pro-ceramic-paint-coating-black-edition-50ml

I use the tower for tubing with my 23lsv.  In my experience the tubes have a tendency to swamp at low speeds while being pulled behind ski pylon or transom.  Adults will usually adjust their position on the tube to compensate but lots of times kids end up losing their grip when it goes down at low speed.  Also with big kids and adults, it’s more fun because they get more air and I generally feel like the angle gives me more control to swing them around as well as swing them back to the safety of the middle of the wake.  
 

Also no real difference as far as tubing goes.  Honestly the 2017+ mxz and lsv’s are going to perform really closely with eachother in most surfing/wakeboarding/ski mediums.  It really comes down to preferred aesthetics, and extra bow space vs extra helm-back space.  

5 hours ago, Cole2001 said:

I used Black fire pro ceramic in the start of the 2022 season. Seemed like the closest product I could find to a professional grade coating, took some time to apply but it flashed nicely and wasn't overly hard. Since then it has held up amazingly well, my boat is outside from March to November, and used in hard water, so it defintlyisn't babied. The only product I have used on it in the last 2 years is Boat bling hot sauce and it still looks great, you can tell it is starting to wear down but still very noticeable that it's coated. 

My previous boat had ceramic pro professionally installed and it was good but I definitely not any better considering the hype and cost of the product. 

The Blackfire product looks interesting. Did you use the standard pro, or the Black Edition? Thanks!

I wouldn’t pull a tube from the tower. On our MXZ, we pulled our tube from the bar on the transom.