Q102 is on a roll. The last Homegrown concert with Levee, Berlin Drop and Bender drew a raucous crowd to Nathan P. Murphy’s to rock out like it was 1976. To keep the momentum going, the station is taking its monthly rock show in another direction: free-range prog rock. Let’s get experimental, shall we? Super String Theory headlines this month’s edition of Homegrown, along with metal up-and-comers Assembly Line Gods and the barely controlled madness known as Knife*Death. They’ll all pile into the Outland Ballroom High Life Live Martini Lounge Saturday night (March 28) under the sweet lighting and audio system. Trip-the-light fantastic? Quite possibly.