[PD] table switching question

[Paris Treantafeles]

Hi List,

I am creating a patch where I'm using tables for LFOs that will  
modulate another oscillator.
Kind of like the example patch B06.table.switching.pd that is the the  
docs - except that the tables are used to modulate another oscillator  
and will play in sequence: table 1, then table 2, and so on.

Here's where I'm stuck. I would like each table to play it's full  
"cycle" before going to the next one.
Is there an object that measures the size of a cycle so I can say  
play table 1 until it's done, then table 2, etc.
Maybe I'm missing something obvious like the  tabosc4~ is always a  
fixed size?
This is an area of Pd that I'm new too, so it might be totally trivial.

If anyone can point me to some info on this, I would appreciate it.

Thanks!
p