NEVER EVER GLUE AN UKIRAN TO THE PEKSI !!!!!!
Just use some cloth to wind around the peksi and put the ukiran on. Not too tight to prevent the ukiran from breaking or cracking. The ukiran should slide rather easily over the peksi just like turning a screw. Then the ukiran fits perfectly on your keris.
Working so long on your keris and then destroying it by glueing the ukiran on it???