With many times practice and play, finally made all in one case.
*** Volumio3 - Raspberry Pi3b+
*** 9038Q2M DAC
*** External Clock PI
*** LT1963 LP Power board
*** Waveshare 7.9" HDMI Display (1280x400)**
*** Aluminum Case from an instrument device, laser cut for the back panel**
Updated on Nov 28, got the Peppymeter working, really like it . Thank you, Volumio Team.