There is a 70 series front disc axle for sale, the perches have been repositioned for a '40 and it comes with a new seal kit. The overall width is about 2" wider than a stock '40. What do you think about this? My '40 is the old balljoint (no Birfs) axle which is near ompossible to convert, so I'd be looking at a newer axle, the mini parts to complete it and a lot of time. $750 plus about $150 shipping, no small decision. But I've got to get rid of the old single circuit braking system. Ed ???