Dave thank you for the source; that price is around $1000 US. I found an email address for them so I will contact them straight away. The 60 series ratios are such that s the only thing to change I really needed would be 2nd gear. I assume he also did the mainshaft gears as well. Per chance did you check on simply having straight cut gears done up for the 56 series box, or are even those weak?