KID CUBA, it can turn into a nice drum, people in Cuba play messed up congas, egged shape edges, un even heads, driedheads, vry similar to yours and make great music with it.
I have a similar conga as the one above, that i will restore, an maybe have caly re do the hardware, and with a good skin, it will sing!
I also repaired a beat up, old gon bops quinto recently, and i am not finish, it had a long crack as ur drum, a few cracks.
Use a flat screw driver to get inside that crack to open it more, it might crack a little bit, once you get the screw driver inside the crack, it will give you space to put plenty of goog glue, such as titebond 3, i fixed like 5 cracks using this method, then use some rope, also use the rings it has to put things back into right place use ur arms to close the shell, and then rope it tight...
i did sucha a good job, that u cant really tell there was cracks, only one crack i will fix again, so it will look cleaner.
I had one question for you did you use a palm sander? to sand faster?
Que te salga bien, may be i could fix it for you...
U might wanna re do the hardware by someone who makes good hardware, put a ne skin, and its gonna sound good..
Those congas have a thick shell, with a nice skin, its gonna sound awasome...and u can take that conga to the park.
..in the future