Hi MacCullum, and a warm welcome to the forum. You will find us a friendly bunch here, as we all love to learn new things and tinker here. It's always nice to welcome another Scotty owner to the forum.
In answer to your question, your machine is a 30" Scott Bonnar Model 65.Model No:65030.
Your cutter (cylinder reel) and soleplate (bedknife and it's holder) assembly
must be removed as a
complete unit.You will find that you are very lucky as well with your model, in that your cutting reel is fully reversible, thus extending the cutting life before sharpening.
The removal procedure for the Model 65 is comprehensively detailed in the operational manual contained in the Lawnmower Parts Lists and Manuals topic on the main forum. Access to this area is by subscription and is explained fully in the thread "How to Access Parts Lists and Manuals" which is the very first thread in any topic on the main forum list.This will also come in handy if you need parts as well.
Once again,MacCullum,
