I have been reading about some difficulties for the DIY'er when it comes to replacing triggers in both the Win 70 and Ruger 77. I have purchased the Timney 401 and 601 triggers, and am considering whether to attempt the replacements myself or take them to a gunsmith. I would appreciate constructive comments, pro or con for the DIY approach vs having a professional do it. If you suggest a professional, would you have any suggestions for someone in the North Houston area? Thank you.