I'd suggest having a good read through the Rollaclub website, & you'll find a wealth of suggestions, & experiences of others, including myself, going back many years.
I just popped in KE30 front brake upgrade, into the search box at the very top, of this page, & it found 37131 references, & 1486 pages, where this subject was covered or canvased.
Good Reading !
Cheers Banjo