new brick oil tank and 4/4 round

[darthvader136]

any one think they can make an oil tank agout 16 long /5 high/6 wide          
and doese any onethink they can make a 4/4 round briclk

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[Chrono]

Actually speaking of a 4x4 round brick, I have a few suggestions to add:

4x4 round as above
1/4 4x4 round
and a 1/4 2x2 round.

Would be best if made default, so everyone has them.