Hi Sozjack,
Firstly Welcome to the ODK Forums.
I've never heard of anyone having an issue on Buffalo Lawn with a Model 45, in actual fact many 1960's lawns were cut using the faithful Scotty and in actual fact many Scotty's were bought purely because of the client having a large Buffalo Lawn and wanting a self driving mower.
Anyway the only way I know of how to extract an extra bit of height out of a model 45 is to remove the threaded adjuster shaft and run a die over it and increase the thread length to provide a bit of extra pull on the roller frame.
The only issue I can see here is that the roller frame will want to pull the shaft at a bit of an angle. Personally I've never had the need to raise the height anywhere near its limit of travel, thus I've never had the need to modify anything in that area of the mower.
I guess you might be the pioneer here so can you please report back with your results so that it can be documented.
Cheers,
BB.
Edit.........................
Regarding this answer to the above post there are now modified front roller frames being fabricated and available on eBay for sale. This will give anyone plenty of extra height.
Cheers,
BB.
Last edited by Bonnar_Bloke; 03/01/19 04:47 PM.