Adapter, Bontrager Blendr saddle to Topeak bag
Description
Some Bontrager saddles feature 2 M5 tapped holes, which is nice for mounting all sorts of things. Here is [Bontrager Blendr Saddle Accessory Mount](https://www.trekbikes.com/us/en_US/equipment/bike-accessories/bike-lights/bike-light-accessories/bontrager-blendr-saddle-accessory-mount/p/24663/) which uses these hardpoints. I have a Topeak saddle bag which I wanted to mount. Because I use a non-offset seatpost & my saddle is largely slid forward, it typically wouldn't mount anyways because the front of the bag would interfere with the back of the seatpost. However, I can solve both problems at once: * the bag mount is offset to the rear by almost 40-50 mm from the stock mount * the 2-bolt pattern allows me to circumvent the original Topeak adapter entirely Note that this print is effectively supporting the weight of the bag & all its contents, so it should be printed for more strength. Note also that I needed to sand the slanted face of the mount down to get the clip to engage. I think the slot also needs to be a bit larger. It's tight now, but with repeated use I trust it will get looser. Until then, the tightness improves security of the bag mount. I've loosened the slots a bit in my fifth revision (second Solidworks revision), also posted.
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