For those who want to pin through the balsa parts, into a very soft building board, these pins will do the trick, leaving the smallest hole possible
Magic Pins - Fine - Purple Daisies Quilting
Patchwork Fine Magic Pins - 1 7/16 x 0.015 - 50/Pack - Green - WAWAK Sewing Supplies
Home page – Wind-it-up Enterprises LLC
Magic Pins Are So Easy To Use-Comfort Grip Handles Are Easy To Grip And Work With Heat Resistant-The Comfort Grip Handles On These Pins Are Heat
Taylor Seville Originals Comfort Grip Magic Pins Extra Long Regular -Quilting Supplies-Sewing Supplies-Sewing Notions-50 Count
Taylor Seville Originals Comfort Grip Magic Pins Patchwork Extra Fine -Quilting Supplies-Sewing Supplies-Sewing Notions-100 Count
Tools and Supplies for Building Models – Wind-it-up Enterprises LLC
Rev-A-Shelf Ras-ml-hdcr Heavy-Duty Spring Loaded Appliance Lift Assist Mechanism
Comfort Grip Magic Pins Patchwork Fine-Quilting Supplies-Sewing Supplies-Sewing Notions-100 Count
Taylor Seville Magic Fork Pins Fine 30 Count Purple for Quilting, Sewing : Arts, Crafts & Sewing