Anyone knows how to make a suspending jerkbait to sink or the other way around??

I know you can use the Storm SuspenStrips or SuspenDots to add weight to a jerkbait.  Give those a try.  As far as the other way around, no clue

lead tape

adding a few simple splitshots will do the trick

wrap the hooks with soilder, or wire. I have a deep redfin that i wrapped the hooks and still had to drill the bait and add some lead (i use number five bbs from a shotgun shell). made it a heck of a bait, but it took about an hour and a half to get it right (suspending).

Tight lines-Jim