Also 2 Sachen.
Wenn der Modus auf Standart steht konnte man immer mit strg gedrückt strukturen überschreiben. Das funzt nicht mehr.

Und im Overwrite Modus kann man keine Strukturen platzieren.

Mit dem kleinen Meisel usw funzt das im Overwrite Modus aber keine Strukturen.

Ist in der neusten Version behoben.

Also wenn die Struktur auf None steht dann geht es. Aber nicht wenn man einen Typ vergibt.

{tiles:[{bBox:[I;24,240,12,28,244,16],tile:{block:"littletiles:ltcoloredblock"}}],min:[I;4,200,0],size:[I;56,48,25],children:[{tiles:[{bBox:[I;28,220,0,44,236,16],tile:{color:-13619152,invisible:1b,block:"littletiles:ltcoloredblock"}}],count:1,dynamic:1b,structure:{color:-13619152,facing:2,dynamic:1b,id:"single_output4",state:0}},{tiles:[{boxes:[[I;29,229,20,40,232,23],[I;35,228,20,40,229,23],[I;36,221,20,40,228,23],[I;36,222,23,37,227,24],[I;35,220,20,36,228,23],[I;29,219,20,35,229,23],[I;28,220,20,29,232,23],[I;27,221,20,28,232,23],[I;26,222,20,27,232,23],[I;27,222,23,28,227,24],[I;28,221,23,29,228,24],[I;35,221,23,36,228,24],[I;29,220,23,35,229,24]],tile:{block:"minecraft:concrete"}},{boxes:[[I;27,222,24,28,227,25],[I;28,221,24,29,228,25],[I;36,222,24,37,227,25],[I;35,228,24,36,229,25,-2147483630,-1],[I;36,227,24,37,228,25,-2147483630,-1],[I;36,221,24,37,222,25,-2147482496,65537],[I;35,220,24,36,221,25,-2147482496,65537],[I;28,220,24,29,221,25,-2142765056,65537],[I;27,221,24,28,222,25,-2142765056,65537],[I;28,228,24,29,229,25,-2147409920,-1],[I;27,227,24,28,228,25,-2147409920,-1],[I;35,221,24,36,228,25],[I;29,220,24,35,229,25],[I;44,204,16,52,244,24],[I;12,204,16,20,244,24],[I;4,216,16,8,232,24],[I;20,200,16,24,248,24],[I;8,240,16,12,244,24,-2147409920,-196612],[I;4,208,16,8,216,24,-2145124352,262148],[I;8,208,16,12,240,24],[I;8,204,16,12,208,24,-2142765056,262148],[I;12,200,16,20,204,24,-2142765056,262148],[I;24,200,16,44,216,24],[I;36,216,20,40,221,24],[I;40,216,16,44,232,24],[I;38,222,23,40,228,24],[I;35,229,23,40,230,24],[I;29,230,23,40,232,24],[I;24,216,20,26,232,24],[I;24,232,20,44,248,24],[I;27,229,23,29,232,24],[I;26,227,23,27,232,24],[I;26,216,20,27,222,24],[I;29,216,20,35,219,24],[I;27,216,20,28,221,24],[I;35,216,20,36,220,24],[I;37,221,23,40,222,24],[I;36,228,23,40,229,24],[I;37,227,23,38,228,24],[I;27,228,23,28,229,24],[I;28,216,20,29,220,24],[I;44,200,16,52,204,24,-2147482496,262148],[I;52,208,16,56,240,24],[I;56,216,16,60,232,24],[I;56,208,16,60,216,24,-2147483072,-196612],[I;52,204,16,56,208,24,-2147482496,262148],[I;52,240,16,56,244,24,-2147483630,-196612],[I;44,244,16,52,248,24,-2147483630,-196612],[I;24,216,16,40,248,20],[I;40,232,16,44,248,20],[I;4,232,16,8,240,24,-2147446784,262148],[I;56,232,16,60,240,24,-2147483639,-196612],[I;12,244,16,20,248,24,-2147409920,-196612]],tile:{block:"littletiles:ltcoloredblock"}},{boxes:[[I;29,229,23,35,230,24],[I;36,221,23,37,222,24],[I;35,220,23,36,221,24],[I;29,219,23,35,220,24],[I;28,220,23,29,221,24],[I;27,221,23,28,222,24],[I;26,222,23,27,227,24],[I;27,227,23,28,228,24],[I;28,228,23,29,229,24],[I;37,222,23,38,227,24],[I;36,227,23,37,228,24],[I;35,228,23,36,229,24]],tile:{color:-6645094,block:"littletiles:ltcoloredblock"}}],count:78,dynamic:1b,structure:{toActivate:[I;],activate:{mode:"TOGGLE",result:0,con:"p.o0",delay:1,bandwidth:1,before:0,state:0},dynamic:1b,id:"state_activator"}}],grid:256,count:1,structure:{name:"Schalter",id:"fixed",signal:[{mode:"EQUAL",con:"c1.b0",delay:1,index:0,state:0}]}}

Habe mal die Structur hochgeladen als Beispiel. Diese kann man nicht im Overwrite Modus placen auch mit mit STRG