Not much good since last Tuesday....Trike is now (gulp) 14 years old, and chewed out the second set of pads of its original equipment Zoom disks.
Wednesday trip to my LBS (Marcus at Walkers Wheels Montmorency, thoroughly recommended) and discussion about possible replacement options. Zoom disk pads like hens teeth to get, with long delays for delivery, if they can be got at all. Not ideal. We settled on Shimano disks with upgrade to hydraulic (from cable) as a start point. Walked away with one disk unit an adaptor mount to try out.
First lot of fiddling with right hand disk - adaptor unit does the trick! Then look at removing the old cable brake handles....The bar end shifters just didn't want to cooperate - couldn't get the brake handles around them, so snapped the handles off by braking the cast clamps.
Second lot of fiddling - the left hand disk. Shimano doesn't make a mirror image caliper unit, dammit. So I see Marcus, come away with a second disk brake unit with a view to engineer (I use that term loosely..) my own adaptor frame so the caliper unit can be fitted with the hydraulic tube exiting rearwards. Marcus had to order in another adaptor mount in any case, allowing me some time to create the new mount frame.
A few trips to Bunnings ensued for some aluminum strap and M5 and M6 bolts etc, then several attempts to create a simple and strong frame. Eventually, the simplest solution worked - fit a piece of strap to the mudguard mount drilled and shaped to fit the top / rear mount of the adaptor plate, with the bottom/front using the front mounting point of the original setup. Quick wheel spin and grip squeeze to test - all good!
Brake handles drilled and bolted to the steering handles of the trike, and spiffy new bar tape wrapped onto the handles. Very minor task to route the hydraulic hoses from the brake handles to the caliper units using the steering rods, with care to make sure there's enough "slack" to allow front wheels to turn lock to lock, and to keep the hoses clear of the chain and the idler puller directly under the seat.
Collected the second Shimano adaptor plate from Marcus at Walkers Wheels this afternoon, fitted it to the right front wheel hub and then mounted the caliper unit. Adjust and then lock down - all done.
Just a driveway test so far, the initial impression is there is far better braking than the original Zoom cable disks. A full confirmation ride tomorrow (Friday).