Thank you for your comment! You're right—upgrading pad material often provides significant improvements in stopping power without needing larger discs. To answer your questions:  

1. Yes, Mini 2-pot calipers can often fit under 15-inch rims, but it depends on the specific rim design and offset, so double-checking clearance is essential .  
2. Brackets for fitting Mini calipers are usually custom-made or sourced from specialized suppliers; some motorsport fabricators offer them, so it’s worth checking with racing or performance shops.  

Mini calipers with competition pads sound like a solid, cost-effective solution!

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