Years ago I had a Studiologic Numa1 organ. Loved the sound, the keyaction not so much, to stiff.
I also had an M-Audio Keystation 61es, with nice keyaction.
https://m-audio.com/products/view/keystation-61es
I opened both and the springs looked similar, so I switched them, separating springs for black and white keys.
Result? Numa1 had much better keyfeel and I sold the M-Audio with stiffer keys.
Then I got me a KeyB Duo Mk2. Same story, great sound but stiff keys. I opened the KeyB, springs looked the same as in Numa so I got me an M-Audio and switched springs.
Result? Much better keyfeel, stiff M-Audio sold.
I have no Legend, but I guess it has the same Fatar keybed as Numa and KeyB, so a springswitch might work.