Need help tweaking a reference design based on DER-500

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I need help tweaking the DER-500 to alter the typical voltage and current a bit.  (I believe this is the easiest route to design as it is the right size and shape and close to the correct power)

Typical voltage for string will range from 32-35v.

Target current 350mA

Need to be able to dim UP and DOWN from lowest possible point as product will be used from zero point.






You may use PIXLS online to modify the parameters and determine the components to change (RFB, CFB, etc). Use DER_500 report as a guide. Here's the link for PIXLS:

I attached the PIXLS spreadsheet as a starting point.