and..I slowly backed away from my computer.  wow.  what a slippery slope!!

 

I kinda want a beefier handle with bigger knobs on my pitching set up.  bone-stock Tatula SV TS.  looks like we have to know the shaft size?  I suppose I can get that from the owner's manual?

 

(help?)

Daiwa S and Shimano A are both 4-mm knob spindles, and knobs interchange with the correct bearing and shim stack.  Knob bearings are 4x7x2.5 mm (740ZZ) - plastic bushings in the same size interchange with bearings. 

As covered on another recent thread, Shimano knob on Daiwa handle needs either a plastic bushing or an extra inboard 740ZZ ball bearing. 

Knobs come with shim washers and plastic bushings, but bearings are up to you. 

Shimano.......................................................................Daiwa

These knobs are easy to find and exchange - most aftermarket knobs will be this size (and of course, complete handles come with the knob bearings). 

The really nice big knobs are lighter than the stock rubber knobs

And yes, those freaking crazy-big Studio Composite and Avail knobs will fit on a Daiwa, Shimano, Avail, Gomexus, Livre handle, etc.  Most everyone who makes aftermarket handles copies Daiwa and Shimano. 

 

The good handles are also lighter, using titanium knob spindles in place of stainless steel.  Swapping handles is really easy.  Daiwa uses 8x5 mm handle slot (rectangular shaft key); Shimano uses 4x7 mm handle slot. 

Complete aftermarket handles will be marked for either Shimano or Daiwa/Abu. 

 

The knob spindle diameter exceptions will be offshore handles, handles made for Ambassadeur, and the rare knobs made for Abu Revo (Lew's, etc.)

 

Abu and Lew's, along with Shimano B and Daiwa L, are 5-mm knob spindle. 

This size knob is tougher to find. 

I am not 100% sure but the handle for the Zillion HD should fit the Tatula. You would need the nut, cover and screws. That handle should cover pitching pretty well. 

 

Another one to look at is Gomexus. There are nice and affordable. 

A handle from an old Ambassadeur would fit the Tatula. 

You should find everything you need above to either swap handles or swap knobs. 

Check out Hawgtech handles. Very affordable with great customer service.