Wheelchair footrest adapter for walker

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My Aunt's Uncle Has Frequent Seizures, Which Severely Impair His Mobility. Due to His Loss of Control Over His Legs, It Becomes Extremely Challenging for My Aunt to Move Him Around When He Uses a Walker. She Asked Me If It Was Possible to Add Footrests from a Standard Wheelchair to the Walker. This Would Allow Him to Lift His Feet Off the Ground, and Then She Could Push Him. The Advantage is That Getting Around Becomes Easier Because the Walker Is Used in This Way About 90% of the Time, So She Only Needs to Rely on the Footrest Occasionally. The Disadvantage is That This Would Void Any Warranty on the Walker. I Initially Thought About Sandblasting the Paint, Machining Brackets, and Then Welding Them On. However, This Approach Has a High Cost in Terms of Both Time and Money. I Decided to Print the Various Revisions Instead, Which Was Still Cheaper and Much Faster. I Came Up with a Design That Is Fairly Small, Requires Few External Components, and Doesn't Require Any Modification to the Walker. They Can Be Removed Pretty Easily. You'll Want to Get the Following Parts: (4) M6x30 SS Dowels, McMaster Part #91585A169 (4) M8x50 Flathead Socket Cap Screws (I Used McMaster Part #92925A164) (4) M8 Jam Nuts (I Found Some at Home) Print One of Each Part on Your Printer's Solid Setting. Press the Dowels into the Hole in Each Part So That 12-15mm or So Protrudes from the Top. This Will Prevent the Footrest From Falling Off During Normal Use. Remove Both Front Wheels of the Walker, and the Side Support Beams. Slide the "Top" Pieces On First, So That the Dowels Are on the Outside of the Walker. Now Replace the Support Beam. Finally, Add the "Lower" Pieces. Reattach the Front Wheels. At This Point, You Just Have to Play with the Spacing So the Footrest Can Rest on Both Upper Surfaces of the Parts. This Is My First Accessibility-Themed Part, But I Am Very Happy With the Way It Came Out, and It Is Making My Aunt's and Uncle's Lives Much Better!