Looking for some guidance here. I want to move my front seat back aft a bit. To do this requires modifying the tubular structure that the seat back leans against. What complicates this is that in my particular airplane there’s no way for this structure to come out due to it being trapped by the cockpit rails. So my plan is to cut it into two pieces to remove it and build a three piece part to go in its place. My thought is to either have the cross tube bolt to the end pieces with a flange or make the cross tube larger dia and have it slide over the end pieces and be secured with a through bolt. Any ideas out there?