I've seen a few posts over the past few days saying "I want to cut aluminum too.. what modifications do i need?!?".
You don't need a Z-Axis upgrade..
You don't need an iron bar for your x-axis..
You don't need to wave a dead chicken over the spindle before you start..
Just do it!! With a little common sense a stock X-Carve can do what you want.
1) Get a good bit. This is what i use..
2) Stay within reasonable speeds:
feed rate: 30 in/min & 0.005 in depth per pass works great in Easel.
3) On the 1000mm stay to the left and out of the middle! Yes, the X Axis on the 1000mm can cause chatter. Staying to the left (12x12) and going slow is the key.
I cut aluminum all the time on my (mostly) stock machine.. The only modification i've done is the '30 minute x-axis upgrade' but i've also cut without it.
Here are some new brackets for my 3D printer (replacing 3d printed brackets) i cut out of 6061 aluminum.
3D STL converted to SVG then imported into Easel (using the cut settings above)... Cut time was 12 minutes each.
Have faith in the stock machine and just do it!!