"Do the targets need to be hit harder" nope, just good connections all round. The good news here is there are only a couple of switches to check:
Capturey (resized).PNG
Reading from bottom to top above, for #1 (for example) to flip, the #1 solenoid has to energize. For that to happen the make/break switch on the #1 Flip Relay must be clean and closed (will have a white wire with blue tracer, and gray with red tracer). And a switch on the #1 Target Relay must be clean and close when Target Relay solenoid energizes (Gray/Red tracer and a yellow wire).
I would also check the switches on the Target Relay part:
Capturez (resized).PNG
Again from bottom up, a make/break on #1 Flip Relay should be clean and closed, and then finally the actual switch behind the target
My tip here...I find that sometimes just cleaning switches with a cotton bud and alcohol gets all the crap off and does the trick. Clean all of them so they are bright..many times you don't need a flexstone unless the contacts are pitted...and more often they are not.