Harv, keep in mind that you need the bobbins as well, which need to have an accurate diameter (see Jasper's drawing). I am sure it can be done for slightly cheaper. To me it's not worth the time.
Yep...hear what you saying Felix about the bobbins...and I agree, probably not worth the grief for one or two...but if possible to make a big saving by getting a few made up at the same time and cutting out the middle man...may be worth while?
The original has locating bungs that expand to lock it in position, I have made a few and sold them for £30 using Delrin bungs that give a interferance fit. I have used one of the ones I made for a few years now, for the racing with differnt gearing for differnt tracks I have found it very useful.
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