The height issue will most likely not raise its head until joining the main hull. I know one F85SR builder who does not have legs on his strong back from the start which would save between 250- 300mm.
Please let me know how it goes if you do decide to build I'd like to keep in touch. I'm talking to other F85SR builders and we try to help each other.
Also the plans are quite extensive. When you first get them many take a back step because of the detail that Farrier includes.
His name depends on builders like us building to a certain standard and so he leaves nothing out and the detail really helps with the build. All you have to do is follow the plans and tick the boxes as you go.
If you decide to build get the plans as soon as you can so you have time to digest the detail.