OK, I've got some pics.
Attachment 39736 The dark spots are the epoxy. Since I had pieces missing from the rail (or outside edge for lack of better term), I was concerned about strength. I used 12ga ROMEX household wire for reinforcement. Works great, but probably unnecessary. It would have looked better with only epoxy.
094.jpgI used VersaChem brand "Plastic Welder" Part #47809 (actually an epoxy because you mix equal amount of 2 chemicals to harden like DAMN!). I was going to use JB WELD because I've used it so many times before. But since this was an epoxy specifically for plastic, I gave it a try. I LIKE IT! It claims to be cream color (when wet), but seems to dry kind of translucent tan. If I were you, I would mix some food coloring to try to get close to the color of your tray. Add it to the epoxy (it wont be the same color after mixed), and glue some junk plastic together with it. You are looking for: 1:color compatibility-2:glue strength! I didn't color my glue, so I don't know if food coloring will ruin the epoxy. I wouldn't think so, but I am not a chemist! If, like me, the color does not bother you; glue it, sand it,enjoy it! I shaped it with 150 grit. Then smoothed it with 220 grit, and finished it with 320 grit (pay no attention to the 1500 grit I mentioned before!). There are other pics I wanted to post, including the package of the glue! But I got too many pics in my folder and don't know how to delete them! I also agree with drilling a hole at the end of a crack!!! this will work. But since you will be using an epoxy, use whatever you are already using to fill hole also. It does work! GOOD LUCK! I know you can save this ball tray! It is not even hard (functionally, that is. Color match...well?). If food color is a no-go, then maybe paint. But function is NOT going to be a problem! OK, I looked at preview post, not even pics I tried to post! Close enough! I can fix things better than I can work a computer!
Repair of Top Front Ball Tray
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Aside from the structural reinforcement with 12 ga solid copper wire (overkill),which yours wont need: all that you need to do is use duct tape on the outside to form the shape of the outside wall. Mix some epoxy and fill the hole. When the epoxy dries, remove tape. The outside will probably have bubbles,waves, and texture of the duct tape! This is to be expected, simply sand smooth inside and out. Mix more epoxy fill in anything low using a piece of cardboard as a trowel (I used the cardboard that the the epoxy was packaged in). Don't be afraid of building it up too thick, you simply sand off the excess. if you try to make it perfect during application it will simply be too low! I think it shrinks a little. Besides final sanding with 1500 grit sandpaper will produce a very smooth finish, you have to build it up to sand it down. This is just a quickie post to fill you in on the basic procedure, I'll post pics when I dig it out and get some good angles on it. Your tray is easily salvageable and will be as strong as ever. Do any cracks extend beyond the hole that are not visible in the photos? If so try to get them to show in photos by changing the angle of lighting or whatever, and I'll try to come op with some ideas for that also.
Buy slightly damaged on the cheap! because if you can fix it... YOU DA MAN! 
#UKPachinko
Originally Posted by pachiwall
Sounds like you will paint the repair when done. Excellent work!
You have achieved what many people won't even try!!! Even If not visually appealing, but functional; YOU ARE A WINNER!
