I modify my DAC SMSL SU-10 which Cannot undo, did I made a improvement or mistake? – DAC – Digital to Analog Conversion

I made my weekend project to modify my $1,000 DAC SMSL SU-10.

The DAC It well built, Sounding great!
 

Due to space issue, I have to place it between amplifier and player with tiny ventilation spaces, I feel it get over heat easily, feeling hot when touch.

I read people review the DAC chip ESS 3090pro degrades it performances when it too hot, Capacitors reduces it lifespan.

To resolve the issue, So I custom made a acrylic base with many holes to replace original metal plate base, but I still feels the heat hard to escape, especially heat from Amplifier going upwards into my DAC.

In the end, I decided a bold move, to open holes at each side, 35 number of holes each side, total 70 holes. each hole dia 3mm, The case 5mm thick aluminum panel quiet hard to drill by free hand.

I have posted my work in other group, people tells me I am actually damaging the case shield prevention from RFI (Radio Frequency Interference) 
 

my question is: with replacement of open acrylic base panel + Drilling holes at each side will it really degrades the performance for the DAC? Reduce sound quality? Because from My ear, I cannot tell the difference. How much my amplifier and CD player will create RFI and how impactful will it interfere with my DAC? 

Anyone in this group with electronic background can explain? thanks.

Moreover, After I finish drilling, just about to assemble back the DAC, I realise this set have serious design flaw, the only screw secure is the RCA output and Coaxial input. The large sockets Balanced output and AES input, doesnt have screw to hold on with the case, the only thing holds on is the soldering on the circuit board, I feel It is risky that anyone accidentally give a hard push, the socket might just break and separated  from the circuit board. 
 

I feel It is bad design compromise the durability for the sake of it look, it is not up to the industrial practiced standard. So I decided to drill hole and add in secure screws myself, (as show with my photos)

Just to share, whoever have SU-10, did not upgrade screws, when insert XLR be gentle and slow   🙂

thanks.