I was looking through Compex.info and found in the FAQ that Compex make a computer programmable version of the Compex Sport called the Compex Sport-P where you can control all the variables! It also appears to be fairly inexpensive (compared to some of thier other products) £400 or around $780, which is cheaper than the Compex Mi 500 for example.
Here’s a pic.
http://boutique.infogym.com/catalog/images/sport_p/spot_p_ordi.jpg
The Explosive Strength programme on the Compex Sport models only contracts for 3 seconds and has rest periods of only 34s. Apparently this works well based on what other people have said on the forum but if you want to use CF’s 10s on 60s rest period then you need to be able to program these parameters.
Unfortunately, the link on the Compex.info site to the Sport-P is broken but you can still download the manual.
http://www.compex.info/07Download/Documentation/index.asp
I guess this model is only available in Europe and has been discontinued. If anyone has any information before that would be cool.
Here are some more links, but not in English.
http://www.adieta.com/productos/es_120.asp
http://www.filsport.it/prodotti/sport-p/default.asp
Cheers,
TC