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Will I experience buyer's remorse if I do a poor man's GRX build or should I go for it?
New (yet to be released) Shimano 1x11 mechanical 2023 brifters + calipers + derailleur = likely about £600
Outgoing 2019 RX600 brifters & RX400 calipers & RD812 derailleur = £425
or secondhand RS405 / 505 brifters & calipers, maybe £200-£250 incl the outgoing RD812