I used a 6.6 a little with my wizard 114.
For the foilx 145 which has similar width to the wizard 130, a 7.0 worked well and an 8.0 didn't give me much more. It felt cramped onboard to me.
The 8.0 works well on my 95cm wide board but I don't bother with the smaller boards on the sail that big. I only really use it when I'm lazy and don't want to fuss with the 9.0hgo.
Can use the 7.0 on a freestyle 115 too but I am not going to bother going bigger.
6.0 7.0 and 8.0 foilglides laid over each other.

7.0 over the 8.0.
The 7.5 gator over the 7.0 foil glide. To Paducah's point the 7.0 does seem kind of big?