producer spencer proffer was hired to record "nightrain" and "sweet child o' mine" to test if he could work with the band. they eventually recorded nine songs during these sessions, including "heartbreak hotel", "don't cry", "welcome to the jungle" and "shadow of your love". in mid to late 1986, the band recorded demos with nazareth guitarist manny charlton, which were released in 2018. (see below for more info)