IMO either an adjustable stem or a stem riser but not both will get the o.p. a fit that they can work with. Personally I would opt for the stem riser. No moving parts, heavy, but not as heavy as an adjustable. There are a skajillion fixed stems with 15, 17,20 and 25 degrees of rise that will be lighter and of higher quality than any adjustable made. The assumption is that an adjustable will be put on a dept. store type BSO and they don't really last.

H