While surfing this website, I became interested in the Defensive Edge cheek piece marketed here, for my 2010 rifle project. Before committing to purchasing one, I would like to ask my fellow forum members for their opinions on the product, and if possible, to provide me with some information on the following: a) Will this product fit on McMillan General Purpose Hunting (M40) and Tikka M595 synthetic stocks? b) Does installation require the services of a competent gunsmith? c) Any satisfied or dissatisfied users out there? Thank you very much in advance, Joaquin B.