I highly recommend you contact Baader for advice and also download their user manuals for both 2" and 1.25" solar wedges from their web site and follow any safety warnings/recommendations.
The 2" solar wedge is suitable for refractors 90-110mm I believe. The 1.25" solar wedge would be for smaller refractors but best to get this info from Baader. The 1.25" will have a smaller light path should would help you with focus provided you still have the focuser travel but being smaller it cannot handle larger refractors.
I'll have a look myself later when I get more time but I suggest you contact Baader for direct advice.
It is possible Baader do not sell a 1.25" version but I know Lunt do or used to.
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