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Just tried printing and I'm getting problems with the base of each "fin" sagging - reckon if I added a V-Shaped notch into the base of each "fin" that it might solve the sagging issue by making it an inward slope instead of an regular bridge?

Any other suggestions on how to fix it - perhaps a change the printing parameters?

(Current attributes: 60mm/s bridging speed, 100% fan speed/cooling - using PLA at 195C (I alter the temp by up to 10 degrees in either direction - the lower temps tend to delaminate though!)

Many thanks!