Because the low angle (13°) I divided the sole (6 mm tick) in two parts. This eases the file job for cutting the seat. In the following pics the sole layout, the bed cut and the joint execution
A aluminium wedge completes the iron bed and lightens the total weight.
I used a smart phone app for measuring the slope: 13°, what I wished.
Arc soldering of sole parts; apart a little leakage (on the left), the bottom is ready. 
The original draw was modified in reducing the central zone tails (where I welded) in order to avoid too much stress while hammering. The grinding by hand begins. 
The aluminium wedge was bored and threaded for inserting a bar as blade depth adjuster. 
Sole and wedge are joint by epoxy glue plus three M6 screws (with thread locker), spread out from bottom side. 
Wooden pattern for iron adjuster 
Before peening, I created secondary bevels in order to give more strength to spread out steel. 
Tail peening, angle grinder for roughing, files, abrasive papers. 
Steel lever cap, 10 mm thick.
Ash posterior and anterior parts, mansonia and wattle wood lever cap screws. 
Metal accessories: 6mm rivet, cylinder (10 mm ext., 6 mm int. diameter) for fixing the front bun, blade adjuster. 
Unfortunately, during the sole flattening some joint voids appeared and I had to fill them with metal plaster. No problem for strenght, but they do not look well. 
I fixed the bun by spreading out the rivet, roughed out by filing and flattened by 80, 150 and 180 grit abrasive paper. 
The plane has a Quangsheng block blade, honed with 25° bevel.The mouth width is less than 1 mm. 
The blade adjusting mechanism is formed by a M5x40 threaded bar, normal pitch, screwed and fixed (by a nut) into aluminium wedge; the blade is adjusted to the wished depth by screwing and unscrewing a lead nut
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