Ken,
Given that you already have a 200+ Baader grating is there any particular reason for adding the SA 100?
I'm interested as I lost my SA 100, but not my RO 200, in the bushfire and am wondering if I need a replacement. The only reason I previously had both was that I used the RO 200 with the 'large' ST8 chip and the SA 100 with the smaller DSI Pro II chip. Now that I have replaced the destroyed DSI with the larger chip Pro III I can get the full RO 200 spectrum on the chip.
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