After the fuselage was glued together, I glued the wings and tail planes into place. I glued a thin strip of styrene sheets to over the wing to the body joint.

4 attached images. Click to enlarge.

Both are coming together nicely, my friend @v1pro!

Thank you, Spiros @fiveten and John @johnb. The Yak-17 build is taking a bit longer than planned but I am really enjoying it very much. I am currently working on the undercarriage assembly. It looks like I have to scratch build the main gear struts. What was vacuformed in the styrene sheet is wrong and I thought I could use the extra gear from the Yak-15 but it is very different. It will also need aileron and rudder trim tabs added which is missing.

4 attached images. Click to enlarge.

My first approach on making the Yak-17 undercarriage was to use the kit's vacu-form nose gear and its fairing cover, and with the main gear use an extra set of my Pioneer Model Yak-15 main gear. After researching the Yak-17 main gear I had to drop using the Yak-15 gear and to scratch built it. The main gear is more like a MiG-15/17 main gear. The Yak-15 main gear has a straight strut holding the wheel at the end while the Yak-17 used the torque links to hold the wheel. The wheel is attached to the lower link and the upper link holds it straight. The gear's strut is attached to both links but the rod end of the strut is attach to the lower link to cushion the impact of the landing combined with the lower torque link swing the wheel up and down.

The vacu-form sheet provides the nose gear, it's fairing, the main gears and its doors. But the main gear is for a Yak-15. I did use the pieces for the nose gear assembly and the main gear doors. This is not a good photo that shows what was used from this sheet, sorry about the quality.

1 attached image. Click to enlarge.

Shots of my main gear assembly build. The shot on the left are the styrene cut pieces from sheets, formed rods from other vacu-form kits, stretch sprue and the wheel comes from a Pioneer Models Yak-15.

The gear doors are from the Yak-17 vacu-form kit. The end result is not exact, but it comes close. Plus this was a big strain to my eyes.

2 attached images. Click to enlarge.

The main gear did come out really nice, Bob @v1pro
You clearly won this battle.

Thank you, Spiros @fiveten and John @johnb. I finally had a chance to get some work done to the Yak-17. I used the drop tanks from my previous Yak-23 build. It needed some trimming to where it is attached to the tip of the wing. The tank on the left shows what was reduced to fit properly under the wing tip.

The following shots show the tank glued into place, I also added trim tabs to the ailerons and rudder. I also added the tail navigational light to the rudder under its trim tab and a landing light on the left wing's leading edge.

5 attached images. Click to enlarge.

I really admire someone who can build a vacuform model, Bob (@v1pro). I can't even make a vac canopy work, and you have built an entire airplane. Both of these are ready to move to the finish line. Nice work!