Having built quite a few rods and fiddled around with balance on numerous occasions, that's exactly what I've found. Short butts mean short leverage against a relatively long blank and impractical levels of weight are required to achieve an ideal balance point. That's not to say some weight won't be helpful; just don't expect to achieve perfect balance.
Yeah if I'd watched this vid before taping the sinkers on - I wouldnt have had to make 3 trips to my tackle box to get sinkers