The I-pacs are worth every penny vs. a keyboard hack--both in terms of performance and time savings.
My time is worth way too much to me to worry about tracking down what does what, and will these work OK together on a keyboard hack.
That's not even mentioning all the money you'll spend on therapy to get sane again.
(Well at least as sane as you CAN be, given that this is your chosen hobby).
With regard to the mouse hack, the same thing applies.
I will spend the $20 or so for an Oscar Optic Card and USB Mouse Hack for a spinner any day.
It's just not worth the hassle to me to "try" to get this working with that, and HOPE that it does.
All the optics are positioned properly on his optic cards.
All you have to do is position them so that the encoder wheel clears the optics, and they work.
The mouse hacks are the same way.
You make sure all the wires go to the right places, based on Oscar's wiring diagrams, and they WORK.