my student is transferring a mculloh 18 cc to glow.fired it up the other day and it was scary.it screamed.hes waiting for a carb of a g23 that works with glow.he drilled the passages out himself in the carb.maybe thats whay it screamed.but he couldnt get a reliable idle and midrange.hes also doing the methanol glow mix to try to save fuel costs.ill watch this thread and post better results.