So I want to do that extra step and skim-bed my chassis. Without much details, the chassis is already modified for my action and I need to bed only at front and at rear tang, i.e. not the whole receiver length. What tricks do you use to keep the mud where it belongs? Any magic with plasticine and painter´s tape so you can get a nice edge? I´ll prabably end up taping the middle section up with aluminium foil since it´s thin enough to not interfere with the action fit...