Dave member, MRP32 has just informed me that the original leaf type micro switches in some boomers can be replaced by these or simular 
I just ordered a package of ten 
http://www.ebay.com/itm/150643553740?ss ... 1439.l2649
I just ordered a package of ten http://www.ebay.com/itm/150643553740?ss ... 1439.l2649