Here is a step-by-step procedure for sharpening ice screws.  This method has worked for me for many years.
Ice_Screw_Sharpening_Procedure_2020.pdf

This is a design for a free-standing bouldering wall that I came up with a few years ago.  It works great for a small space.
bouldering_wall_plans.pdf

A couple of good reports on ice screw and anchor strength written by J. Marc Beverly & Stephen W. Attaway, PhD.
Ice_Climbing_Anchor_Strength.pdf
Dynamic_Shock_Load_Evaluation_of_Ice_Screws_Final.pdf