Understandable and commendable. Too many folks buy blindly and then complain that it wasn't what they expected. There is too much information on the web to not do a cursory search to get a better idea of what you're spending your hard earned money on.
People will drive five or ten miles out of their way to save 5¢ on a gallon of gas, less than a buck for most fill ups, yet they won't ask for or Google the answer before spending nearly $50 on a model.
A better question is, is it worth it to convert the Tamiya kit or will just buying a more complete kit by another manufacturer for the same or lesser amount of money?
In other words, sell the Tamiya kit for $20 and use the savings to purchase a superior kit of that version.