Wanted to make my own temperature calibration item with different values for ABS, PLA, and polycarbonate. I can upload the Solidworks file if anyone would like it.I would suggest a raft or brim as this thing is tall and skinny. Mine took about 90 minutes to finish. The part is 100mm tall with 10 temperatures so edit the code file to change temperature every 10mm. I set mine up (see below) so that there wouldn't be any blobs on the side of the print as the extruder stopped to change temperature. EX: G1 Z20.000 F9600.000 ;(Layer change for 20mm) G1 X110 Y110 ;(Center nozzle inside of triangle. Might be different for your bed.) M109 S275 ;(wait for temperature to be reached.Set according to triangle values.)