When done, (and it may take a little fussy cutting to get it right), just slide in your blast tube, and rotate it to lock it in place.
You do need to make a wire hook long enough to slide the blast tube onto once you are done winding. It hangs on the stooge when not in use. I usually put a handle on mine. Note: many modelers use a rod that has a loop on the winder end, and just wind the motor with the long wire between the motor and winder.
This explanation may not be clear, so I will post a picture to explain it better.

This tube is from my (sound of weeping), OOS Debut embryo. I will cut off the end to fit the Bad Axe. You can carefully heat the end of the tubing with a heat gun, and mash an old golf ball into the end to flare it out.
As you can see, it fits the model all the way to the tubing where the rubber anchors. You may have a model that you would want to check this dimension on the plan prior to building to insure that your blast tube fits.

Here's a link to Shorty's Basement/Volare short kits and kits: Click Here
The Bad Axe is down the page a ways.
Sky9pilot

Just back from Lowe's where I got 10' of tubing for blast tubes for $3.19.

A little progress, except for the extras need to make it a pop off wing.
So far, so good.
2 grams, which is fine.  I have high hopes for this one.

It is a simple plane, and an excellent plan, so it will be a piece of cake.
It will have a little extra lumber in the wing center section to hold the pop off wing DT. I think it will need it.

This is the excellent kit put out by George Bredehoft. (He won the Nats this summer with this design).
I need to move fast as we only have two contests left this year. I will make the gear removeable, and it will have a pop off wing DT.
This is a nice short kit by George, good wood, and a very nice plan. You should get one.
Can't wait to see it waaaaaay up there.