The concern about such things has always been balance and runout and how well it will hold for long CNC sessions.
It’s been mentioned/discussed since the SO3 days, but I’ve never seen any positive reports.
Note that rather than do something like this, we worked with our manufacturer to implement ER-11 collets:
rather than do this sort of thing.
Some folks use a small catch tray or bin underneath for tool changes.
Perhaps upgrading to ER-11 would be more workable?
Note that a pair of good quality wrenches will help a lot. The community has the following notes:
Carbide Compact Router/Makita RT0700/0700 shaft and collet/nut wrench sizes:
- 13mm — note that this must be low profile.
- Amazon.com
- Bicycle cone wrenches work as well such as the 13mm Park Tool PT-09 Shop Cone Wrench
- Asahi low profile 11/13mm wrench
- McMaster-Carr Tight-Clearance Open-End Wrench with Black Finish, 13 mm Size, 4" Overall Length (sourced from Martin as of mid-2020)
- 22mm — a stubby wrench is well-suited for this, and handier due to the low torque requirements
ER-11 spindle collet shaft and collet/nut wrench sizes:
- 12mm (note that some machines may accepted 13 mm (see above) or 1/2"), possibly needs to be low profile.
- Amazon.com * Amazon.com
- McMaster-Carr — note that these are currently: Product Information Amazon.com
- 17mm open-end wrench — specialty ER-11 collet wrenches such as: ER11 Collet Wrench for ER11 Collet Nuts MariTool are available.
For true tool-less tool changes see: