Newbie here using 1.3.9f. How should I setup 3 levels of product resolution for my site? For example:
1. Car manufacturer - selections (Ford, GMC, Chevy, VW, Audi)
2. Part description - selections (master cylinder, alternator, steering pump)
3. All part numbers matching the answers selected in 1 and 2 above in a drop down menu.
Is there a limit to how many categories or product types you can have? My 1st question (categories) above has about 30 entries and my 2nd question (product types) has only about 6. Is it possible to have dropdown lists for question3? The dropdown lists will have a hundred or so possible entries in each.

Since I could swap the items in 1 & 2? Are there limits for either?

Any help is appreciated.