Printing different model sections with different materials

[bananaman]

Hi experts, I've done a lot of printing with single extruder machines and do fine. Now trying a dual (nozzles at same fixed height).
I've done a few basic things and I thought printing the model below would be easy enough with dual extruders but no success.

The turbine disk has fine trailing edges and every variation of printing same material support I've tried (PLA and ABS) damages the fine trailing edges when removing the support. So I thought that a simple disc of PVA would be easy enough, frustratingly wrong.

I'd like to print the PVA slow and at a different temp to PLA and have quite different settings for each material.
I tried separate processes, but that isn't working for me, they seem to work against each other.
The dual wizard is only for same materials right?
I could print using Simplify generated support as another material but I hoped I could draw and print my own support structures.

What am I doing wrong or isn't it possible?

[brian442]

You can use the dual extrusion wizard for different materials. You just need to make sure you setup that material combination in your profile first. So if you are using PLA+PVA, then open your profile and check to see if that material is listed in the "auto-configure for material" drop down list. If not, click the "+" sign and then configure whatever temperatures, fan speeds, heated bed, etc you need for that combination.

Then when you go back to the dual extrusion wizard, you can select the PLA+PVA configuration