Thank you for the detailed reply - I'm very appreciative! You have identified a major issue with using an NF5 bike on a regular basis and have come up with a good solution - well done!
I have a dismantled crank that I pulled apart to inspect for wear. Honda cranks are well built particularly the rods which are high quality. After crack testing the rods, I would certainly risk running them again for at least 1 rebuild without replacing (Only caveat to this is you would need to know the complete history of the crank since new eg - any over-revs, type of oil used, time spent sitting idle and total mileage since installation)
Please let all forum members know when you have all the required parts in stock. I for one will send you at least 2 cranks so I have additional spares for my 2 bikes.
As you will need to machine the cases meaning, I would need to send over 2 cranks and a set of cases - do you have a cost estimate for the complete job? I won't hold you to it but an approximation of cost will assist O/S customers who have to combine freight into the complete cost.
Many thanks again!