私はの助けが必要 ~ TE37SL サイズ

Dear Minkara friends, i am in need of some help. Since i ordered my RE雨宮 AD-GTII kit, i've been looking to purchase wheels to go with my kit. I'm primarily interested in the Volk Racing TE37SL wheels. I saw that R-Magic is having a special for their custom sized TE37SL wheels https://minkara.carview.co.jp/en/userid/154459/blog/32196678/, but i was wondering if someone could help me understand why they chose to go with a custom offset for the front wheels, F: 18x10.5 +35. I noticed on their demo car, they use this same wheel, but then they add a 10mm spacer. https://minkara.carview.co.jp/en/userid/154459/car/1402829/profile.aspx Wouldn't they have been better off just using a 18x10.5 +22 wheel which is essentially the same thing except they don't need to run a spacer.

Also, in their thread, they keep referring to "逆ゾリディスク", and according to google translate, this means "Reverse Sledding Disk" which doesn't really make any sense. What is so special about "逆ゾリディスク" that R-Magic needed to request a custom offset from Rays Engineering just for their FD's?

Is there an optimal TE37SL fitment for an FD with the RE雨宮 AD-GTII kit? Please help!!

有り難う御座います.