The European version of Slide it in was still a Martin Birch production after initial attempts with Eddie Kramer had failed (DC didn't like the way he recorded his voice). When WS got a deal from Geffen, Geffen demanded that a US producer - Keith Olsen - give the album some sheen via a remix. Coverdale was first violently opposed but eventually relented. In the process of the remix also some rerecording was done to mirror WS line up changes. So on the US version Colin Hodkinson's bass tracks were erased and Neil Murray - having returned from Gary Moore - played new bass tracks (you can hear his different more, forceful approach on Too Many People Walking in the Shadow of Love and he doesn't chord on Spit it Out like Hodkinson did). Overall, Murray moved away fropm his intricate style with Ian Paice (still the drummer, he says today, most sympathetic to his bass playing) and reduced his playing to making Cozy Powell sound fat (who had famously stormed out of a drum booth during the initial Slide it in sessions to snap at bassist Colin Hodkinson: "Let me introduce myself, I am the. Drummer!").
John Sykes also contributed some solos, fashionable sqeals (eg in Slow and Easy) and beefed up rhythm playing, but not all of Moody's parts were erased, so you actually hear three guitarists on the US version, Galley, Moody and Sykes.
The US remix was aimed at sounding better on American radio - somthing John Kalodner of Geffen had an eye on. That part of the plan succeeded, Slide it in got US airplay like no WS album before. Coverdale and the band despised the US remix initially and it took them weeks to adjust to it.
More changes were underway:John Kalodner who had already been instrumental in ousting Moody and Hodkinson for lacking star quality also felt Jon Lord's B-3 sound seventy-ish and out of place (as did John Sykes), but Jon got a rescue call from the reunifying Purple and handed in his WS papers. And Galley - whose old school blues and funk style did not really gel with Johny Sykes Gary Moore-style histrionics - conveniently broke his arm on a fairground while climbing over cars in drunken stupor. The break was messy and would force him to wear a leather and steel brace around his left arm all the way down to his fingers henceforth. Coverdale, in one of his less than kind moments, decided that such a brace could not be presented to the rock public and fledgling MTV, so Galley was dismissed (Sykes relishing in his role as the new now truly solo guitarist). A far cry from how Def Leppard would treat their drummer losing a whole arm a few years later, but I guess that is the difference between being a band of friends from school or hired hands around one band leader.
