Actually I planned a 3 stage cascade, but now I want to try 4 stages. I started with the build last week.
Here is the old thread of the 3 stager: http://www.xtremesystems.org/forums/...ad.php?t=85580
I kicked the huge coaxil heatexchangers, and bought some nice plate HX. Furthermore I use only Danfoss compressors now.

1.stage
Danfoss SC21CLX
1,1kw condenser
3,6m 0,9mm captube (TC-36)
plate HX
R507a
Dixell XR10C Thermostat (PTC probe)

2.stage
Danfoss SC18CLX
Desuperheater
Henry S-5181 oilseparator
3,8m 0,9mm captube (TC36)
plate HX
R1150

3.stage
Danfoss SC15CLX
Henry S-5181 oilseparator
plate HX
R14

4.stage
Danfoss SC15CLX
Enthitzer
Henry S-5180 oilseparator
plate HX
chilly1 evap
methane

Last week I took the first pictures

























Today I insulated the plate heatexchangers, but I have to take photos of it tomorrow.