what is the best jackplate to use on my 28 ?

I have always used CMC ( cook mfg ) and bought pair stainless manual plates from them for my 32

If You have 2.5`s with 15'' mids. I have a set for sale. PM me . Steve

I used the R+R's on my boat. Way nicer piece than the CMC. Especially if you use them in salt water. Peter from Skater just tried a set also.

I have 20 " mids

what kind of speeds are you getting with the 300xs?

depends on the set up. I live in S. FL and most of the time the boat is used in the ocean so i have it set up for a ton of acceleration. I have seen over 110mph this summer in 98 degree heat at LKN.