If you have a dual extruder please give me the dirt. Good? bad? wish you didnt?

[curious aardvark]

you should be able to find a chip hack for the stratasys online somewhere.

If you will buy from a machine from a company notorious for both the cost of their materials and their totally locked down infrastructure.
well, you get what you pay for :-)

The flashforge and qidi dual extruders - based on the replicator pro design - are pretty good.
There are inherent issues with the two nozzles together style of extruder. But onve you get them calibrated - they generally work very well.

these days I'd be looking at an idex setup like bikeracers got.
There are a lot around from about $600 on up to whatever you want to pay.

I still feel ultimakers are a lot of money for what you get, but they are good machines and generally do what it says on the tin :-)
For the same money - or less - there are much bigger and better machines around.