[Raft configuration issues on new install of cura 4.8]

I’ve been using cura 4.7.2 for a while, but started having issues with the computer.  I installed the latest (4.8) and started having problems with the raft being difficult to remove.  Unfortunatly I don’t know how the previous version was configured.  
 

Question: what raft setting should I be looking at relative to the model adhesion to the raft.  I have tweaked a few but none have helped thus far.  
 

Also, I had managed it get two layer raft with 4.7.2 but can’t get less than three with 4.8.   I am well aware that this is a user deficient, not a software problem.

 

Thank,

Charlie

[80mm jump on layer 3 causing "waves on the ocean".]

Somethng has changed in my setup and can't figure out what. Im using Cura 4.7.1 and printing on a Ender 3 Pro with PLA @ 215 /65c, 20mm/s and 100% flow and everything has been working perfectly.  The first and second layers are spot on.   Then for layer 3, the Z jumps from .38mm layer height to 1.18mm.  I can figure out why.  Day before yesterday everything was fine, but this started yesterday and continues on to today.  I have looked all through the cura profile and I can't see anything that I can pin this on.  I don't doubt that I may have accidentally changed something but I don't know what.   

 

Can anybody give me an idea of where to look?   BTW, if I use  brim instead of a raft, layer three seems to come up just fine.  It's only the raft that is screwing up.

 

[Changing feed rate at certain layers.]

I do a lot of repetitive printing and sometimes like to change the feed rate at certain layers or millimeters.  For instance if or printing a partially threaded bolt standing on end, I might want to print the raft and bolt head at 200%, then slow down to 100% for the bolt shaft, and then slow to 25% at the beginning of the threads.  This works perfectly if I stay with the print to modify the speed at those points.  I’m looking for a way to automate that process (preferably in slicing) so that I don’t have to hover over the printer to make sure I crank the speed up or down at the appropriate layer/height.

 

is that possible in cura?

[Layer view color coding issue with old eyes.]

I am using Cura 4.7.1. I’m having an issue with the colors used in layer view.  I am partially color blind and the colors being used by default are very hard for my brain to process.  I watch tons of vids that use a much easier set of colors that my brain has no problem with.  I’ve been through the menus looking for a place where these colors can be changed with no success.  I have to assure it’s possible but can’t figure out how.

 

Can someone Help me with this?

[Interface layers and support removal.]

Why is this not posted so others might chime in?

[Interface layers and support removal.]

I’ve been learning cura at a slow rate.  I was doing fine with easily removed support structures.  Apparently, in my exploring, I changed something and now support is very hard to remove.  I think this may have something to due with interface layers but not sure what I need to change and to what value.

 

i need help understanding what might have caused a change in the ability to remove support.