This adapter will connect your Makita orbital sander to a standard 1.25" vacuum hose. I've been using it pretty much daily in my shop since 2019, it works great!
 
The adapter is 3D printed using flexible TPU. It fits sander models: BO5041, XOB01Z, B05030, BO5031, BO4566, BO3710.
Also available in my Etsy shop 
And in my Ebay shop
 
This is the third iteration of the design, I gave it longer neck sections so it securely slips onto the sander and the 1.25" hose. It fits snug enough I can lift and drag the sander around by the hose, yet comes off the hose easily when you need to move the hose to another tool. 
 
Related - Looking for something to do with your worn out sander pad? I put a handle on one of mine and found it to be surprisingly useful! Check it out here!
 
More info in case you're interested:
There are other versions of this adapter, and I'm sure they work fine, but here's why I think mine is better:
1 - I use this same adapter myself on my Makita B05041 so I know it works well. It's held up to regular (and some irregular) use for over 2 years. You'll see it in practically all my sanding pictures on Instagram. 
2- It's made from a flexible polyurethane plastic so it has a little "give" while sanding. Most other versions I see are made from rigid PLA plastic.
3 - I can make it in an obnoxious color so you're less likely to loose it or have someone "borrow" it 🤣
4 - If you have your own 3D printer, I'm happy to share the design. The file for this is available on Thingiverse with my printer settings here https://www.thingiverse.com/thing:3956160

Free shipping is included in the US. Please feel free to message me with any questions!