Hi , ....welcome to TU
The shape of your lure does not look bad as a glider jerkbait , I don't quite figure out , why it did not have a good glide , .........probably a ballast issue ?
Anyway , now being converted into a crankbait there seem to be new issues involved , as such thin bodied crankbaits may often cause problems .
At first I would try to assemble a temporary line tie somewhere below the chin of the lure ,..... just bend a piece of wire similar to a rod guide(or use a small rod ring from the start)and tape it onto desired location , ......try you lure in a bath tub pool or shallow bank , where you could easily recover it in case your assembly falls off !
This way you can determine , whether changing line tie position alone would let your lure work or you would need to make further changes .
Your lure is obviously thru-wired , so for a new line tie you would have to mount a screw eye , .........extend its pilot hole entry a bit bigger for up to 1/5" deep and apply epoxy glue , when finally twisting it in ,------- this way a kinda "glue plug" evolves in the hole extension making it much stronger , .............I had boated up to 47" northern pike on lures rigged that way without any issues .
A good choice of screw eyes you can find atMy link
If this line tie affair alone would not work out , the next option would be to play with ballast , .....again tape some weights to the belly at fferent locations and test the lure , ........if you're satisfied with one option , drill a hole and glue in the weight with epoxy glue , ....sand smooth and paint .
But it also seems to me , that your lip is fairly large , you could also try to make it a bit narrower at its widest place , maybe even also shorten it !
I but remember to always test your lure after each working step , not that you would do "too much of a good thing" !
I strongly believe , that you could fix this lure with a change of line tie location and maybe a bit of minoring the lip plane , ........for future lure projects also check My link
, there are some describtions and building plans there .
It is a Dutch site , but a version in English is also available . For newbies I always recommend a glider jerkbait called "The Roach" in there(it's original name is "Heiddy") , .......it is an "easy build , easy fish" sinking glider , thatz surely won't fail to nail them pike or even musky(don't know for sure about that , don't have them in Europe) .
I sometimes use homemade aluminium lips as well , but I have found , that these can get quite heavy and spoil the casting performance of a lure ,..... sometimes even it's balance .
I most likely build "screw-on" lips of aluminium sheet , if I want the line tie mounted onto the lip , ......in your case I would have used a lip of lexan , either homemade or purchased from the shop linked above .
good luck , diemai