Hi
forget standard superglue it doesn't bond at all to the underside of the Scalextric plastic track, if your sure the pocket is 100% correct for depth you have a couple of options to get it correct. ..
Remove the track piece and see if it's totally flat if not apply light pressure over a sharp edge to get it back flat , just used this on a track I've completed for a mate, second check the underside of the track for sensor boards etc and then drill countersink for small woods crews, now fix through the section, you can afford to apply quite a bit of pressure and make the track sink a little that way when you fill the screw heads with filler you can also blend in the concave section, thirdly , if you look under the track section you can see a number of plastic cylinder sections, I've never worked out if these are simply ejector pins from the moulding that push it out after its been injected or there actual supports but there's nothing from stopping anyone from filling them with wooden dowel and then screwing from underside the board, I've not tried the latter but have had success with the first two methods
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Here is a Video of an embedded track I just got powered up last night , alignment of the track sections has worked out very nice , just the xlc at the farthest point needs replacing as I couldn't get the alignment of the mdf to plastic as good as the others, plus one of the flippers has died. ..
forget standard superglue it doesn't bond at all to the underside of the Scalextric plastic track, if your sure the pocket is 100% correct for depth you have a couple of options to get it correct. ..
Remove the track piece and see if it's totally flat if not apply light pressure over a sharp edge to get it back flat , just used this on a track I've completed for a mate, second check the underside of the track for sensor boards etc and then drill countersink for small woods crews, now fix through the section, you can afford to apply quite a bit of pressure and make the track sink a little that way when you fill the screw heads with filler you can also blend in the concave section, thirdly , if you look under the track section you can see a number of plastic cylinder sections, I've never worked out if these are simply ejector pins from the moulding that push it out after its been injected or there actual supports but there's nothing from stopping anyone from filling them with wooden dowel and then screwing from underside the board, I've not tried the latter but have had success with the first two methods

Here is a Video of an embedded track I just got powered up last night , alignment of the track sections has worked out very nice , just the xlc at the farthest point needs replacing as I couldn't get the alignment of the mdf to plastic as good as the others, plus one of the flippers has died. ..