in think it is no waste of time, he is big and has nearly unlimeted potential, so you could get a damn strong center with solid inside skills - i like this starting values lot more then the one of a solid Center with lot of atrocious and pitififuls in the guardskills(because especially when the alary is around 70k+ i would pay lot more if he also has secondaries) - and hey the weaknesses in his main Skills are lot easier to fix then those one of the secondaries. Sorry Kozlo for having a totally other point of view then you ;)
Could be a Good PF, in the beginning especially for outside tactics, and helpful in unconventional defensive like 1-3-1 and full court press.